/* ============================================================
   INFYNI-KIDS Website - Complete Stylesheet
   Figma-accurate: 1920x1080 base, vw + clamp() responsive
   ============================================================ */

/* ===== Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
  width: 100%;
}

body {
  font-family: 'Noto Sans KR', 'Noto Sans', 'Noto Sans Arabic', 'Noto Sans Thai', 'Noto Sans Devanagari', 'Noto Sans SC', 'Noto Sans TC', 'Segoe UI', 'Tahoma', sans-serif;
  background: #f0f4f8;
  color: #333;
  overflow-x: hidden;
  line-height: 1.6;
  width: 100%;
  max-width: 100vw;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Responsive safety: prevent content from exceeding viewport */
.section-inner > * {
  max-width: 100%;
  box-sizing: border-box;
}

/* ===== CSS Variables ===== */
:root {
  /* Colors - exact Figma values */
  --primary: #258895;
  --primary-light: #96e1eb;
  --teal: #219dad;
  --teal-dark: #258895;
  --accent-green: #3ad06d;
  --cover-grad-start: #cbffa1;
  --cover-grad-end: #b4fe7a;
  --purple: #5351bc;
  --purple-light: #7774ef;
  --orange: #f08c3a;
  --blue: #3b94ee;
  --blue-alt: #3091ea;
  --blue-light: #e8f4fd;
  --dark-purple-start: rgba(72, 41, 160, 0.9);
  --dark-purple-end: #7e76e7;
  --chart-red: #e04040;
  --section-bg-light: #f5f9fc;
  --section-bg-cloud: #eaf5fa;

  /* Navigation */
  --nav-height: 64px;

  /* Fonts */
  --font-display: 'Jua', 'Noto Sans KR', sans-serif;
  --font-body: 'Noto Sans KR', sans-serif;
  --font-en: 'Poppins', sans-serif;

  /* Layout */
  --max-w: 1600px;
  --section-py: clamp(40px, 4.2vw, 80px);
  --section-px: clamp(20px, 3vw, 60px);

  /* Font scale - at 1920px = 100vw */
  --fs-huge: clamp(32px, 4.7vw, 90px);       /* 90px at 1920 */
  --fs-large: clamp(26px, 3.65vw, 70px);      /* 70px at 1920 */
  --fs-section: clamp(22px, 2.5vw, 48px);     /* 48px at 1920 */
  --fs-subtitle: clamp(18px, 2.08vw, 40px);   /* 40px at 1920 */
  --fs-body-lg: clamp(15px, 1.56vw, 30px);    /* 30px at 1920 */
  --fs-body: clamp(14px, 1.25vw, 24px);       /* 24px at 1920 */
  --fs-small: clamp(12px, 1.04vw, 20px);      /* 20px at 1920 */
}

/* ===== Fixed Navigation ===== */
.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
  transition: background 0.3s ease, box-shadow 0.3s ease;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
}

.nav-bar.scrolled {
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0 24px;
  height: var(--nav-height);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.nav-logo-mark {
  height: 26px;
  width: auto;
}

.nav-logo-text {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 15px;
  color: #5A6174;
  letter-spacing: 1.5px;
  line-height: 1;
}

.nav-logo-divider {
  width: 1px;
  height: 24px;
  background: rgba(90, 97, 116, 0.3);
  margin: 0 10px;
  flex-shrink: 0;
}

.nav-logo-witty {
  height: 36px;
  width: auto;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.nav-quick-links {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
  margin: 0 clamp(12px, 2vw, 28px);
}

.nav-quick-link {
  border: 1px solid rgba(37, 136, 149, 0.2);
  background: rgba(255, 255, 255, 0.88);
  color: #2f5460;
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 700;
  font-family: var(--font-body);
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-quick-link:hover {
  border-color: rgba(37, 136, 149, 0.4);
  color: #1f7280;
}

.nav-quick-link.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37, 136, 149, 0.3);
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  background: #f0f4f8;
  border-radius: 24px;
  padding: 3px;
  gap: 8px;
}

.lang-btn {
  padding: 6px 16px;
  border: none;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  background: transparent;
  color: #7c8a96;
  transition: all 0.3s ease;
  font-family: var(--font-body);
}

.lang-btn.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 8px rgba(37, 136, 149, 0.3);
}

.lang-btn:hover:not(.active) {
  color: var(--primary);
}

.lang-select-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.lang-select {
  border: none;
  background: transparent;
  color: #33414f;
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-body);
  padding: 6px 10px;
  border-radius: 20px;
  min-width: 180px;
  cursor: pointer;
}

.lang-select:focus {
  outline: 2px solid rgba(37, 136, 149, 0.35);
  outline-offset: 1px;
}

.lang-select option {
  color: #1f2b36;
  background: #fff;
}

@media (orientation: landscape) {
  .nav-quick-links {
    display: flex;
  }
}

@media (orientation: landscape) and (max-width: 1199px) {
  .nav-quick-links {
    gap: 6px;
    margin: 0 12px;
  }

  .nav-quick-link {
    padding: 6px 10px;
    font-size: 11px;
  }

  .lang-select {
    min-width: clamp(110px, 22vw, 160px);
  }
}

body.lang-rtl [data-i18n],
body.lang-rtl [data-i18n-placeholder],
body.lang-rtl .lang-select {
  direction: rtl;
  text-align: right;
}

/* ===== Scroll Progress Bar ===== */
.scroll-progress {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent-green));
  z-index: 999;
  transition: width 0.1s linear;
  width: 0%;
}

/* ===== Section Sidebar (Dots) ===== */
.section-sidebar {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  border: 2px solid rgba(37, 136, 149, 0.4);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.sidebar-dot.active {
  background: var(--primary);
  border-color: var(--primary);
  transform: scale(1.3);
}

.sidebar-dot:hover {
  border-color: var(--primary);
  transform: scale(1.2);
}

.sidebar-dot::after {
  content: attr(data-label);
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.75);
  color: white;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.sidebar-dot:hover::after {
  opacity: 1;
}

/* ===== Main Content ===== */
.main-content {
  padding-top: var(--nav-height);
  width: 100%;
  max-width: 100%;
}

/* ===== Shared Section ===== */
.section {
  width: 100%;
  min-height: 56.25vw; /* 16:9 ratio at desktop */
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.section-inner {
  max-width: min(var(--max-w), 100%);
  margin: 0 auto;
  padding: var(--section-py) var(--section-px);
  position: relative;
  width: 100%;
  box-sizing: border-box;
}

/* ===== Scroll Animation ===== */
.section .section-inner {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

.section.visible .section-inner {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   SECTION 01: Cover
   ============================================================ */
.section-01 {
  background: linear-gradient(180deg, var(--cover-grad-start) 0%, var(--cover-grad-end) 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.section-01 .section-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-top: clamp(40px, 5vw, 100px);
  padding-bottom: clamp(70px, 6vw, 100px);
  min-height: calc(100vh - var(--nav-height));
  justify-content: center;
  position: relative;
}

/* Decorations */
.s01-decorations {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.s01-lightbulb {
  position: relative;
  z-index: 2;
  width: clamp(80px, 10vw, 190px);
  height: auto;
  aspect-ratio: 1 / 1;
  display: block;
  margin: 0 auto;
  animation: s01LightbulbFloat 3s ease-in-out infinite;
}

@keyframes s01LightbulbFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.s01-star-red {
  position: absolute;
  top: 11%;
  right: 12%;
  width: clamp(40px, 4.58vw, 88px);
  height: clamp(40px, 4.58vw, 88px);
  animation: s01Twinkle 2s ease-in-out infinite;
}

.s01-star-dark {
  position: absolute;
  top: 34%;
  right: 20%;
  width: clamp(24px, 2.6vw, 51px);
  height: clamp(22px, 2.5vw, 48px);
  animation: s01Twinkle 2.5s ease-in-out infinite 0.5s;
}

.s01-puzzle {
  position: absolute;
  top: 17%;
  left: 18%;
  width: clamp(50px, 5.9vw, 114px);
  height: clamp(50px, 5.9vw, 114px);
  transform: rotate(-90deg);
  animation: s01Float 4s ease-in-out infinite 1s;
}

.s01-star-yellow {
  position: absolute;
  bottom: 28%;
  left: 13%;
  width: clamp(40px, 4.7vw, 90px);
  height: clamp(40px, 4.7vw, 90px);
  animation: s01Twinkle 3s ease-in-out infinite 0.3s;
}

/* Rainbow arcs */
.s01-rainbow {
  position: absolute;
  bottom: 28%;
  width: clamp(100px, 12.5vw, 240px);
  height: clamp(90px, 11vw, 210px);
}

.s01-rainbow-left {
  left: -5.5%;
}

.s01-rainbow-right {
  right: -5.5%;
  bottom: 36%;
  transform: scaleX(-1);
}

.s01-rainbow-yellow {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.s01-rainbow-pink {
  position: absolute;
  top: 5%;
  left: 12%;
  width: 96%;
  height: 94%;
}

.s01-rainbow-green {
  position: absolute;
  top: 10%;
  left: 22%;
  width: 90%;
  height: 90%;
}

/* Cloud */
.s01-cloud {
  position: absolute;
  left: 6%;
  bottom: 50%;
  width: clamp(80px, 10vw, 192px);
  height: clamp(56px, 6.9vw, 133px);
  animation: s01Float 5s ease-in-out infinite 0.5s;
}

@keyframes s01Float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes s01Twinkle {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(0.85); opacity: 0.6; }
}

/* Title area */
.s01-text {
  position: relative;
  z-index: 2;
  margin-bottom: clamp(24px, 3vw, 60px);
}

.s01-subtitle {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: 500;
  color: #4a6a3a;
  margin-bottom: clamp(8px, 0.8vw, 16px);
  letter-spacing: 0.5px;
}

.s01-title {
  font-family: var(--font-display);
  font-size: var(--fs-huge);
  color: #333;
  line-height: 1.2;
}

/* Characters at bottom */
.s01-characters {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 0;
  margin-top: auto;
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: clamp(500px, 52vw, 1000px);
}

.s01-char {
  flex-shrink: 0;
}

.s01-char-duck {
  width: clamp(100px, 9.4vw, 180px);
  margin-right: clamp(-15px, -1vw, -8px);
  align-self: flex-end;
}

.s01-char-pear {
  width: clamp(110px, 10.4vw, 200px);
  margin-right: clamp(-8px, -0.5vw, -4px);
  z-index: 1;
}

.s01-char-otter {
  width: clamp(150px, 14.6vw, 280px);
  z-index: 2;
}

.s01-char-wolf {
  width: clamp(130px, 12.5vw, 240px);
  margin-left: clamp(-8px, -0.5vw, -4px);
  z-index: 1;
}

/* Scroll Indicator */
.s01-scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  position: absolute;
  bottom: clamp(12px, 1.5vw, 28px);
  left: 50%;
  transform: translateX(-50%);
  transition: opacity 0.4s ease;
  z-index: 3;
  animation: s01ScrollFade 2.5s ease-in-out infinite;
}

.s01-scroll-mouse {
  width: 24px;
  height: 38px;
  border: 2px solid rgba(74, 106, 58, 0.5);
  border-radius: 12px;
  position: relative;
}

.s01-scroll-wheel {
  width: 4px;
  height: 8px;
  background: rgba(74, 106, 58, 0.6);
  border-radius: 2px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: s01ScrollWheel 1.8s ease-in-out infinite;
}

.s01-scroll-text {
  font-family: var(--font-body);
  font-size: clamp(12px, 1vw, 14px);
  color: rgba(74, 106, 58, 0.7);
  letter-spacing: 1px;
}

@keyframes s01ScrollWheel {
  0% { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(10px); }
}

@keyframes s01ScrollFade {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ============================================================
   SECTION 02: What is INFYNI?
   ============================================================ */
.section-02 {
  background: #fff;
}

.section-02 .section-inner {
  text-align: center;
}

.s02-title {
  font-family: var(--font-display);
  font-size: var(--fs-large);
  color: var(--blue);
  margin-bottom: clamp(12px, 1.2vw, 24px);
}

.s02-tags {
  display: flex;
  justify-content: center;
  gap: clamp(8px, 0.8vw, 16px);
  margin-bottom: clamp(20px, 2vw, 40px);
  flex-wrap: wrap;
}

.s02-tag {
  padding: clamp(6px, 0.5vw, 12px) clamp(14px, 1.3vw, 28px);
  border-radius: 6px;
  font-size: var(--fs-small);
  font-weight: 700;
  color: #fff;
}

.s02-tag-purple {
  background: var(--purple);
}

.s02-tag-purple-light {
  background: var(--purple-light);
}

.s02-content {
  margin-bottom: clamp(24px, 2.5vw, 48px);
}

.s02-screenshots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 1.5vw, 32px);
  flex-wrap: wrap;
  background: var(--blue-light);
  border-radius: clamp(16px, 1.2vw, 24px);
  padding: clamp(20px, 2vw, 40px);
}

.s02-screen-left,
.s02-screen-right {
  background: #fff;
  border-radius: clamp(12px, 1vw, 20px);
  padding: clamp(12px, 1vw, 20px);
  max-width: clamp(280px, 26vw, 500px);
  position: relative;
  flex: 1;
  min-width: 240px;
}

.s02-screen-label {
  font-size: var(--fs-small);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: clamp(6px, 0.5vw, 12px);
  text-align: left;
  padding: clamp(4px, 0.4vw, 8px) clamp(10px, 0.8vw, 16px);
  background: var(--blue-light);
  border-radius: 8px;
  display: inline-block;
}

.s02-screen-img {
  width: 100%;
  border-radius: clamp(8px, 0.6vw, 12px);
}

.s02-arrow {
  font-size: clamp(24px, 2vw, 40px);
  color: var(--primary);
}

.s02-description {
  max-width: clamp(500px, 46vw, 900px);
  margin: 0 auto;
}

.s02-description p {
  font-size: var(--fs-body);
  line-height: 1.8;
  color: #444;
}

/* ============================================================
   SECTION 03: Process
   ============================================================ */
.section-03 {
  background: radial-gradient(ellipse at center, #e8f4fc 0%, #dbeef8 50%, #f0f8fc 100%);
  min-height: auto;
}

.section-03 .section-inner {
  text-align: center;
  padding-bottom: clamp(30px, 3vw, 60px);
}

.s03-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  color: var(--blue);
  margin-bottom: clamp(30px, 3vw, 60px);
}

.s03-circle-container {
  position: relative;
  width: 100%;
  max-width: clamp(700px, 56vw, 1060px);
  margin: 0 auto;
  min-height: clamp(480px, 40vw, 740px);
}

.s03-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: clamp(320px, 28vw, 520px);
  height: clamp(320px, 28vw, 520px);
  z-index: 0;
  opacity: 0.9;
}

.s03-center-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-en);
  font-size: clamp(14px, 1.3vw, 26px);
  font-weight: 700;
  color: #333;
  background: #fff;
  padding: clamp(14px, 1.2vw, 24px);
  border-radius: 50%;
  width: clamp(110px, 10vw, 190px);
  height: clamp(110px, 10vw, 190px);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 30px rgba(37, 136, 149, 0.18);
  border: 3px solid var(--primary-light);
  z-index: 2;
}

.s03-step {
  position: absolute;
  width: clamp(220px, 17vw, 330px);
  text-align: left;
}

/* Number badges removed — headings already include step numbers */

.s03-step h3 {
  font-family: var(--font-display);
  font-size: var(--fs-body);
  color: var(--blue);
  margin-bottom: clamp(6px, 0.5vw, 10px);
}

.s03-step p {
  font-size: var(--fs-small);
  color: #555;
  line-height: 1.7;
}

.s03-step-1 { top: 4%; right: 0; }
.s03-step-2 { top: 38%; right: 0; }
.s03-step-3 { bottom: 0; left: 50%; transform: translateX(-50%); text-align: center; }
.s03-step-4 { top: 38%; left: 0; text-align: right; }
.s03-step-5 { top: 4%; left: 0; text-align: right; }

.s03-bubble {
  position: absolute;
  bottom: 20%;
  right: 0;
  max-width: clamp(230px, 18vw, 350px);
  background: linear-gradient(135deg, #e3f6fd, #d4f0fc);
  border-radius: 16px;
  padding: clamp(12px, 1.1vw, 20px);
  font-size: var(--fs-small);
  color: var(--primary);
  line-height: 1.6;
  border: 1.5px solid var(--primary-light);
  box-shadow: 0 4px 16px rgba(37, 136, 149, 0.1);
}

/* ============================================================
   SECTION 04: Cognitive Abilities
   ============================================================ */
.section-04 {
  background: linear-gradient(180deg, #e5f2f8 0%, #d8eef6 50%, #eaf5fa 100%);
  position: relative;
  min-height: auto;
}

.section-04::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: clamp(40px, 4.2vw, 80px);
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 80"><path fill="%23e5f2f8" d="M0,0 C480,80 960,80 1440,0 L1440,80 L0,80 Z"/></svg>') no-repeat bottom;
  background-size: cover;
}

.s04-header {
  text-align: center;
  margin-bottom: clamp(30px, 3vw, 60px);
}

.s04-header p {
  font-family: var(--font-display);
  font-size: var(--fs-subtitle);
  color: #333;
  line-height: 1.5;
}

.s04-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: clamp(16px, 1.5vw, 32px) clamp(12px, 1vw, 20px);
  max-width: clamp(600px, 60vw, 1200px);
  margin: 0 auto;
}

.s04-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(6px, 0.6vw, 12px);
}

.s04-icon {
  width: clamp(60px, 8.7vw, 167px);
  height: auto;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
  overflow: hidden;
  flex-shrink: 0;
}

.s04-icon:hover {
  transform: scale(1.1);
}

.s04-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50%;
  image-rendering: auto;
}

.s04-item span {
  font-size: var(--fs-small);
  font-weight: 700;
  color: #333;
  text-align: center;
}

/* ============================================================
   SECTION 05: Content Updates
   ============================================================ */
.section-05 {
  background: linear-gradient(180deg, var(--orange) 0%, #f5a050 100%);
  color: #fff;
  position: relative;
}

.section-05 .section-inner {
  text-align: center;
  padding-bottom: clamp(24px, 2.5vw, 48px);
  position: relative;
  z-index: 2;
}

.s05-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  margin-bottom: clamp(12px, 1.2vw, 24px);
  color: #fff;
}

.s05-update-box {
  background: rgba(255, 255, 230, 0.9);
  color: #333;
  padding: clamp(12px, 1vw, 20px) clamp(20px, 2vw, 40px);
  border-radius: 16px;
  display: inline-block;
  margin-bottom: clamp(20px, 2vw, 40px);
}

.s05-update-box p {
  font-size: var(--fs-body);
  line-height: 1.7;
}

.s05-highlight-line {
  display: inline;
}

.s05-highlight {
  color: var(--orange);
  font-weight: 800;
  font-size: var(--fs-body-lg);
}

.s05-app-preview {
  max-width: clamp(300px, 30vw, 580px);
  margin: 0 auto clamp(12px, 1.2vw, 24px);
  position: relative;
  z-index: 2;
}

.s05-ui-img {
  border-radius: clamp(12px, 1vw, 20px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

.s05-characters {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.s05-char-left {
  position: absolute;
  left: -2%;
  top: 30%;
  width: clamp(100px, 10.4vw, 200px);
}

.s05-char-right {
  position: absolute;
  right: -2%;
  top: 25%;
  width: clamp(120px, 11.5vw, 220px);
}

.s05-char-br {
  position: absolute;
  right: 5%;
  bottom: 5%;
  width: clamp(80px, 7.3vw, 140px);
}

.s05-char-bl {
  position: absolute;
  left: 5%;
  bottom: 5%;
  width: clamp(70px, 6.3vw, 120px);
}

/* ============================================================
   SECTION 06: 3D Learning
   ============================================================ */
.section-06 {
  background: #fff;
  position: relative;
  min-height: auto;
}

.section-06 .section-inner {
  text-align: center;
}

.s06-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  color: #333;
  margin-bottom: clamp(10px, 1vw, 20px);
  line-height: 1.4;
}

.s06-title-purple {
  color: var(--purple);
}

.s06-desc {
  font-size: var(--fs-body);
  color: #555;
  line-height: 1.7;
}

.s06-device {
  max-width: clamp(400px, 35vw, 680px);
  margin: clamp(24px, 2.5vw, 48px) auto 0;
  background: linear-gradient(135deg, #8ecfe8, #b0e8f0);
  border-radius: clamp(16px, 1.5vw, 28px);
  padding: clamp(16px, 1.5vw, 28px);
  position: relative;
}

.s06-screen {
  background: #fff;
  border-radius: clamp(12px, 1vw, 20px);
  padding: clamp(16px, 1.5vw, 28px);
  text-align: center;
}

.s06-game-text {
  font-family: var(--font-display);
  font-size: var(--fs-body);
  color: var(--primary);
  margin-bottom: clamp(10px, 1vw, 20px);
}

.s06-game-img {
  max-width: clamp(160px, 15vw, 300px);
  margin: 0 auto clamp(12px, 1.2vw, 24px);
}

.s06-game-btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  padding: clamp(8px, 0.8vw, 16px) clamp(32px, 3vw, 60px);
  border-radius: 30px;
  font-family: var(--font-display);
  font-size: var(--fs-body);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.s06-game-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 16px rgba(37, 136, 149, 0.3);
}

.s06-decorations {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.s06-circle-pink {
  position: absolute;
  left: 8.8%;
  top: 20%;
  width: clamp(60px, 8.4vw, 161px);
  height: clamp(60px, 8.4vw, 161px);
}

.s06-star-yellow {
  position: absolute;
  left: 7.3%;
  top: 60%;
  width: clamp(60px, 8.2vw, 157px);
  height: clamp(57px, 7.8vw, 150px);
  transform: rotate(-35deg);
}

.s06-square-yellow {
  position: absolute;
  right: 7%;
  top: 12%;
  width: clamp(44px, 6vw, 116px);
  height: clamp(44px, 6vw, 116px);
  background: #ffea9e;
  border-radius: 4px;
  transform: rotate(-24.91deg);
}

.s06-triangle-green {
  position: absolute;
  right: 10%;
  top: 39%;
  width: clamp(46px, 6.35vw, 122px);
  height: clamp(80px, 11vw, 211px);
  transform: rotate(-134.31deg) scaleY(-1);
}

/* ============================================================
   SECTIONS 07-08: Content Examples (Shared)
   ============================================================ */
.section-content-example {
  background: #fff;
}

.section-content-example:nth-child(even) {
  background: var(--section-bg-light);
}

.sce-header {
  text-align: center;
  margin-bottom: clamp(24px, 2.5vw, 48px);
}

.sce-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  color: var(--blue);
  line-height: 1.4;
}

.sce-highlight {
  color: var(--purple);
}

.sce-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(20px, 2vw, 40px);
  align-items: start;
}

.sce-game-card {
  background: #fff;
  border-radius: clamp(14px, 1.2vw, 24px);
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.sce-game-img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.sce-game-title {
  font-family: var(--font-display);
  font-size: var(--fs-body);
  color: #333;
  padding: clamp(12px, 1vw, 20px);
  text-align: center;
}

.sce-howto {
  background: #fff;
  border-radius: clamp(14px, 1.2vw, 24px);
  padding: clamp(20px, 2vw, 36px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.sce-howto-label {
  font-family: var(--font-display);
  font-size: var(--fs-body-lg);
  color: var(--blue);
  margin-bottom: clamp(10px, 1vw, 20px);
  text-decoration: underline;
  text-underline-offset: 6px;
  text-decoration-color: var(--primary-light);
}

.sce-desc {
  font-size: var(--fs-small);
  line-height: 1.8;
  color: #444;
}

/* --- Section 07 Character (Wolf) --- */
.s07-character {
  position: absolute;
  right: 2%;
  bottom: -4%;
  width: clamp(120px, 15.6vw, 300px);
  pointer-events: none;
  z-index: 2;
}
.s07-wolf {
  width: 100%;
  transform: rotate(-21deg);
}

/* --- Section 08 Character (Otter) --- */
.s08-character {
  position: absolute;
  right: 1%;
  bottom: -2%;
  width: clamp(110px, 13.5vw, 260px);
  pointer-events: none;
  z-index: 2;
}
.s08-otter {
  width: 100%;
}

/* ============================================================
   SECTION 09: Numeracy
   ============================================================ */
.section-09 {
  background: linear-gradient(180deg, #e8f5e0 0%, #d0eee0 100%);
}

.section-09 .section-inner {
  text-align: center;
}

.s09-levels {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(10px, 1vw, 20px);
  margin-bottom: clamp(24px, 2.5vw, 48px);
  flex-wrap: wrap;
}

.s09-level {
  background: #fff;
  border-radius: clamp(14px, 1.2vw, 24px);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  width: clamp(180px, 15.6vw, 300px);
}

.s09-level-badge {
  padding: clamp(8px, 0.6vw, 14px);
  font-family: var(--font-en);
  font-size: var(--fs-small);
  font-weight: 600;
  color: #fff;
  text-align: center;
}

.s09-lv1 { background: #7bb0ff; }
.s09-lv2 { background: #aca5ff; }
.s09-lv3 { background: #7774ef; }

.s09-level-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.s09-eq {
  padding: clamp(8px, 0.8vw, 16px);
  font-size: var(--fs-body);
  font-weight: 700;
  color: #333;
}

.s09-arrow {
  font-size: clamp(20px, 1.8vw, 34px);
  color: var(--primary);
}

.s09-bottom {
  background: #fff;
  border-radius: clamp(14px, 1.2vw, 24px);
  padding: clamp(20px, 2vw, 36px) clamp(24px, 2.2vw, 42px);
  max-width: clamp(500px, 44vw, 850px);
  margin: 0 auto;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.s09-bottom h3 {
  font-family: var(--font-display);
  font-size: var(--fs-body-lg);
  color: var(--blue);
  margin-bottom: clamp(8px, 0.8vw, 16px);
  text-decoration: underline;
  text-underline-offset: 6px;
  text-decoration-color: var(--primary-light);
}

.s09-bottom p {
  font-size: var(--fs-small);
  line-height: 1.8;
  color: #444;
}

/* --- Section 09 Character (Pear) --- */
.s09-character {
  position: absolute;
  left: -2%;
  bottom: 12%;
  width: clamp(90px, 10.4vw, 200px);
  pointer-events: none;
  z-index: 2;
}
.s09-pear {
  width: 100%;
  transform: rotate(28deg);
}

/* ============================================================
   SECTION 10: Language
   ============================================================ */
.section-10 {
  background: #fff;
}

.section-10 .section-inner {
  text-align: center;
}

.s10-levels {
  display: flex;
  justify-content: center;
  gap: clamp(16px, 1.5vw, 30px);
  margin-bottom: clamp(24px, 2.5vw, 48px);
  flex-wrap: wrap;
}

.s10-level {
  background: #fff;
  border-radius: clamp(14px, 1.2vw, 24px);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  width: clamp(200px, 17.7vw, 340px);
}

.s10-level-badge {
  padding: clamp(8px, 0.6vw, 14px) clamp(12px, 1vw, 20px);
  font-size: var(--fs-small);
  font-weight: 700;
  color: #fff;
  text-align: center;
}

.s10-lv1 { background: #7bb0ff; }
.s10-lv2 { background: #aca5ff; }
.s10-lv3 { background: #7774ef; }

.s10-level-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.s10-bottom {
  background: var(--section-bg-light);
  border-radius: clamp(14px, 1.2vw, 24px);
  padding: clamp(20px, 2vw, 36px) clamp(24px, 2.2vw, 42px);
  max-width: clamp(500px, 44vw, 850px);
  margin: 0 auto;
}

.s10-bottom h3 {
  font-family: var(--font-display);
  font-size: var(--fs-body-lg);
  color: var(--blue);
  margin-bottom: clamp(8px, 0.8vw, 16px);
  text-decoration: underline;
  text-underline-offset: 6px;
  text-decoration-color: var(--primary-light);
}

.s10-bottom p {
  font-size: var(--fs-small);
  line-height: 1.8;
  color: #444;
}

/* --- Section 10 Character (Duck) --- */
.s10-character {
  position: absolute;
  right: 3%;
  bottom: -2%;
  width: clamp(100px, 12vw, 230px);
  pointer-events: none;
  z-index: 2;
}
.s10-duck {
  width: 100%;
  transform: rotate(-30deg);
}

/* ============================================================
   SECTION 11: Case Studies
   ============================================================ */
.section-11 {
  background: linear-gradient(180deg, #f0f8fc 0%, #e8f4fa 100%);
}

.section-11 .section-inner {
  text-align: center;
}

.s11-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  color: var(--blue);
  margin-bottom: clamp(6px, 0.5vw, 10px);
}

.s11-hashtag {
  font-family: var(--font-display);
  font-size: var(--fs-subtitle);
  color: var(--purple);
  margin-bottom: clamp(24px, 2.5vw, 48px);
}

.s11-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(20px, 2vw, 40px);
  max-width: clamp(700px, 60vw, 1200px);
  margin: 0 auto;
}

.s11-case {
  text-align: left;
}

.s11-case-label {
  font-size: var(--fs-small);
  font-weight: 800;
  color: #333;
  margin-bottom: clamp(8px, 0.7vw, 14px);
}

.s11-case-img {
  width: 100%;
  border-radius: clamp(16px, 1.5vw, 28px);
  aspect-ratio: 16/9;
  object-fit: cover;
}

.s11-case-double {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(8px, 0.7vw, 14px);
}

.s11-case-img-half {
  width: 100%;
  border-radius: clamp(16px, 1.5vw, 28px);
  aspect-ratio: 3/4;
  object-fit: cover;
}

/* ============================================================
   SECTION 12: Growth Results
   ============================================================ */
.section-12 {
  background: #fff;
  position: relative;
  min-height: auto;
}

.section-12 .section-inner {
  text-align: center;
}

.s12-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  color: var(--blue);
  margin-bottom: clamp(6px, 0.5vw, 10px);
}

.s12-hashtag {
  font-family: var(--font-display);
  font-size: var(--fs-subtitle);
  color: var(--purple);
  margin-bottom: clamp(24px, 2.5vw, 48px);
}

.s12-content {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: clamp(24px, 2.5vw, 48px);
  align-items: center;
  max-width: clamp(600px, 65vw, 1300px);
  margin: 0 auto;
}

.s12-chart-card {
  background: #fff;
  border-radius: clamp(14px, 1.2vw, 24px);
  padding: clamp(20px, 2vw, 36px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.s12-chart-title {
  font-family: var(--font-display);
  font-size: var(--fs-body-lg);
  color: var(--chart-red);
  margin-bottom: clamp(16px, 1.5vw, 28px);
}

.s12-chart-bars {
  display: flex;
  align-items: flex-end;
  gap: clamp(3px, 0.4vw, 8px);
  height: clamp(120px, 12vw, 240px);
  padding: 0 clamp(4px, 0.5vw, 10px);
}

.s12-bar {
  flex: 1;
  background: linear-gradient(180deg, #b8e870 0%, #90d850 100%);
  border-radius: 6px 6px 0 0;
  height: var(--h, 50%);
  position: relative;
  min-width: 0;
  transition: height 0.8s ease-out;
}

.s12-bar span {
  position: absolute;
  bottom: clamp(-28px, -1.8vw, -38px);
  left: 50%;
  transform: translateX(-50%);
  font-size: clamp(8px, 0.6vw, 12px);
  color: #666;
  white-space: nowrap;
  letter-spacing: -0.5px;
}

.s12-bar-highlight {
  background: linear-gradient(180deg, #ff9080 0%, #ff6050 100%);
}

.s12-person {
  text-align: center;
}

.s12-person-info p {
  font-size: var(--fs-small);
  line-height: 1.6;
  color: #555;
}

.s12-time-bubble {
  background: #e8f8e0;
  border-radius: 16px;
  padding: clamp(12px, 1vw, 20px);
  margin-top: clamp(12px, 1.2vw, 24px);
}

.s12-time-bubble p {
  font-family: var(--font-display);
  font-size: var(--fs-body);
  color: var(--accent-green);
}

/* --- Section 12 Character (Duck) --- */
.s12-character {
  position: absolute;
  right: 2%;
  bottom: -3%;
  width: clamp(100px, 12vw, 230px);
  pointer-events: none;
  z-index: 2;
}
.s12-duck {
  width: 100%;
}

/* ============================================================
   SECTION 13: Smart Standard
   ============================================================ */
.section-13 {
  background: linear-gradient(180deg, #f0f8fc 0%, #e8f4fa 100%);
}

.section-13 .section-inner {
  text-align: center;
}

.s13-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  color: var(--blue);
  margin-bottom: clamp(6px, 0.5vw, 10px);
}

.s13-subtitle {
  font-family: var(--font-display);
  font-size: var(--fs-subtitle);
  color: var(--purple);
  margin-bottom: clamp(24px, 2.5vw, 48px);
}

/* --- S13 Content Area: 2-column layout --- */
.s13-content-area {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 1.5vw, 30px);
  margin-bottom: clamp(24px, 2vw, 40px);
  flex-wrap: wrap;
  max-width: 100%;
}

/* --- S13 Features: triangular circle arrangement --- */
.s13-features {
  position: relative;
  width: clamp(280px, 24vw, 460px);
  height: clamp(260px, 22vw, 420px);
  flex-shrink: 0;
}

.s13-circle {
  position: absolute;
  width: clamp(130px, 11vw, 210px);
  height: clamp(130px, 11vw, 210px);
}

.s13-circle-pos1 { top: 5%; left: 0; }
.s13-circle-pos2 { top: 0; right: 0; }
.s13-circle-pos3 { bottom: 0; left: 50%; transform: translateX(-50%); }

.s13-circle-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(14px, 1.2vw, 24px);
  transition: transform 0.3s ease;
  border: clamp(3px, 0.25vw, 5px) solid rgba(255, 157, 170, 0.3);
}

.s13-circle-inner:hover {
  transform: scale(1.08);
}

.s13-c1 { background: linear-gradient(135deg, #fce4ec, #f8bbd0); }
.s13-c2 { background: linear-gradient(135deg, #fce4ec, #f8bbd0); }
.s13-c3 { background: linear-gradient(135deg, #fce4ec, #f8bbd0); }

.s13-circle-inner span {
  font-size: var(--fs-small);
  font-weight: 700;
  color: #333;
  text-align: center;
  line-height: 1.4;
}

/* --- S13 Arrow --- */
.s13-arrow {
  font-size: clamp(24px, 2vw, 40px);
  color: var(--purple);
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

/* --- S13 Report (right side) --- */
.s13-report {
  max-width: clamp(300px, 28vw, 540px);
  flex-shrink: 0;
}

.s13-report-img {
  border-radius: clamp(12px, 1vw, 20px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
}

.s13-desc {
  font-size: var(--fs-body);
  line-height: 1.8;
  color: #444;
  max-width: clamp(500px, 42vw, 800px);
  margin: 0 auto;
  text-align: center;
}

.s13-desc strong {
  font-weight: 800;
  color: #222;
}

/* --- Section 13 Character (Otter) --- */
.s13-character {
  position: absolute;
  left: -1%;
  bottom: -2%;
  width: clamp(110px, 13vw, 250px);
  pointer-events: none;
  z-index: 2;
}
.s13-otter {
  width: 100%;
}

/* ============================================================
   SECTION 14: Pricing
   ============================================================ */
.section-14 {
  background: #fff;
  min-height: auto;
}

.section-14 .section-inner {
  text-align: center;
}

.s14-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  color: var(--blue);
  margin-bottom: clamp(10px, 1vw, 20px);
}

.s14-subtitle {
  font-size: var(--fs-body);
  color: #555;
  margin-bottom: clamp(24px, 2.5vw, 48px);
}

.s14-quick-compare {
  display: none;
}

.s14-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 1.5vw, 30px);
  max-width: clamp(700px, 60vw, 1200px);
  margin: 0 auto;
}

.s14-card {
  background: #fff;
  border: 3px solid rgba(146, 146, 146, 0.3);
  border-radius: clamp(20px, 1.56vw, 30px);
  padding: clamp(24px, 2vw, 40px) clamp(18px, 1.5vw, 28px);
  text-align: left;
  box-shadow: -4px 10px 8px rgba(146, 146, 146, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.s14-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.s14-card-featured {
  background: linear-gradient(-20deg, rgba(76, 201, 255, 0.176), rgba(235, 251, 255, 0.35), rgba(0, 174, 232, 0.4));
  border-color: rgba(146, 146, 146, 0.3);
  box-shadow: -4px 10px 8px rgba(146, 146, 146, 0.3);
}

.s14-card-badge {
  display: inline-block;
  padding: clamp(4px, 0.4vw, 8px) clamp(12px, 1vw, 22px);
  background: linear-gradient(124deg, rgb(99, 205, 240), rgb(43, 152, 213));
  border: none;
  border-radius: clamp(30px, 2.34vw, 45px);
  font-size: var(--fs-small);
  font-weight: 700;
  color: #fff;
  margin-bottom: clamp(10px, 1vw, 20px);
}

.s14-billing {
  font-size: clamp(11px, 0.73vw, 14px);
  color: #888;
  margin-bottom: clamp(8px, 0.8vw, 16px);
}

.s14-price {
  margin-bottom: clamp(14px, 1.2vw, 24px);
}

.s14-price-num {
  font-size: var(--fs-section);
  font-weight: 800;
  color: #222;
}

.s14-price-per {
  font-size: var(--fs-small);
  color: #888;
}

.s14-features {
  list-style: none;
}

.s14-features li {
  display: flex;
  align-items: flex-start;
  gap: clamp(6px, 0.5vw, 10px);
  margin-bottom: clamp(8px, 0.6vw, 12px);
  font-size: var(--fs-small);
  color: #555;
  line-height: 1.5;
}

.s14-check {
  color: #aaa;
  font-weight: 700;
  flex-shrink: 0;
}

.s14-check-blue {
  color: var(--primary);
}

.s14-note {
  font-size: clamp(10px, 0.65vw, 12px);
  color: #999;
  padding-left: clamp(20px, 1.5vw, 28px);
  margin-top: clamp(-4px, -0.3vw, -2px);
}

.s14-subtitle strong {
  font-weight: 800;
}

/* ============================================================
   SECTION 15: Benefits / Donation
   ============================================================ */
.section-15 {
  background: linear-gradient(180deg, #f0f8fc 0%, #e8f4fa 100%);
  min-height: auto;
}

.section-15 .section-inner {
  text-align: center;
}

.s15-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  color: #363636;
  margin-bottom: clamp(20px, 2vw, 40px);
  line-height: 1.3;
}

.s15-photos {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(16px, 1.5vw, 30px);
  max-width: clamp(550px, 50vw, 960px);
  margin: 0 auto clamp(20px, 2vw, 40px);
}

.s15-photo {
  border-radius: clamp(20px, 1.56vw, 30px);
  aspect-ratio: 16/9;
  object-fit: cover;
  border: clamp(8px, 0.78vw, 15px) solid #9ddafc;
}

.s15-donation-box {
  background: #f6f6f6;
  border-radius: clamp(20px, 1.56vw, 30px);
  padding: clamp(18px, 1.5vw, 30px) clamp(28px, 2.5vw, 48px);
  display: inline-block;
  margin-bottom: clamp(14px, 1.2vw, 24px);
  box-shadow: 4px 8px 20px rgba(118, 192, 234, 0.4);
}

.s15-donation-box p {
  font-size: var(--fs-body);
  line-height: 1.7;
  color: #333;
}

.s15-cta p {
  font-size: var(--fs-small);
  color: #000;
  background: rgba(143, 212, 251, 0.65);
  display: inline-block;
  padding: clamp(12px, 1vw, 22px) clamp(24px, 2vw, 40px);
  border-radius: clamp(20px, 1.56vw, 30px);
}

/* ============================================================
   SECTION 16: Comparison Table
   ============================================================ */
.section-16 {
  background: #fff;
  min-height: auto;
}

.section-16 .section-inner {
  text-align: center;
}

.s16-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  color: #494949;
  margin-bottom: clamp(24px, 2.5vw, 48px);
  line-height: 1.3;
  display: inline-flex;
  align-items: center;
  gap: clamp(8px, 0.6vw, 14px);
}

.s16-bracket-left,
.s16-bracket-right {
  font-size: clamp(40px, 3.5vw, 70px);
  font-weight: 300;
  color: var(--blue);
  line-height: 1;
}

.s16-highlight {
  color: #5351bd;
}

.s16-table {
  max-width: min(clamp(600px, 55vw, 1100px), 100%);
  margin: 0 auto;
  border-collapse: collapse;
  width: 100%;
  overflow-wrap: break-word;
  word-break: keep-all;
}

.s16-table-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-bottom: 2px solid #ddd;
  padding-bottom: clamp(8px, 0.8vw, 16px);
  margin-bottom: clamp(6px, 0.5vw, 10px);
}

.s16-col-left {
  font-size: var(--fs-small);
  font-weight: 400;
  color: #5b6575;
  text-align: center;
}

.s16-col-right {
  font-size: var(--fs-small);
  font-weight: 400;
  color: #3a4556;
  text-align: center;
}

.s16-table-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-bottom: 1px solid #eee;
}

.s16-table-row:nth-child(even) {
  background: #fffbe6;
}

.s16-cell-left,
.s16-cell-right {
  padding: clamp(10px, 0.8vw, 18px) clamp(12px, 1vw, 20px);
  font-size: var(--fs-small);
  color: #000;
  text-align: center;
  line-height: 1.5;
}

.s16-cell-right {
  font-weight: 700;
  color: #1b1b1b;
}

/* --- Section 16 Characters (Wolf + Otter) --- */
.s16-characters {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}
.s16-wolf {
  position: absolute;
  left: -2%;
  bottom: -4%;
  width: clamp(110px, 13vw, 250px);
  transform: rotate(-15deg);
}
.s16-otter {
  position: absolute;
  right: -1%;
  bottom: -3%;
  width: clamp(110px, 13vw, 250px);
}

/* ============================================================
   SECTION 17: Parent Reviews
   ============================================================ */
.section-17 {
  background: linear-gradient(180deg, #e8f4fa 0%, #f0f8fc 100%);
  min-height: auto;
}

.section-17 .section-inner {
  text-align: center;
}

.s17-intro {
  font-size: var(--fs-body);
  line-height: 1.8;
  color: #333;
  max-width: clamp(550px, 50vw, 960px);
  margin: 0 auto clamp(24px, 2.5vw, 48px);
}

.s17-intro strong {
  font-weight: 800;
  color: #222;
}

.s17-reviews {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 1.5vw, 30px);
  max-width: clamp(700px, 60vw, 1200px);
  margin: 0 auto;
}

.s17-card {
  background: #fff;
  border-radius: clamp(20px, 1.67vw, 32px);
  padding: clamp(20px, 2vw, 36px);
  box-shadow: 0 0 12px rgba(61, 0, 29, 0.35);
  text-align: left;
  transition: transform 0.3s ease;
  position: relative;
}

/* Clipboard clip design */
.s17-card-clip {
  position: absolute;
  top: clamp(-14px, -1vw, -8px);
  left: 50%;
  transform: translateX(-50%);
  width: clamp(36px, 3vw, 56px);
  height: clamp(18px, 1.5vw, 28px);
  background: #bbb;
  border-radius: clamp(4px, 0.3vw, 6px);
}
.s17-card-clip::after {
  content: '';
  position: absolute;
  top: 40%;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 40%;
  background: #999;
  border-radius: clamp(2px, 0.2vw, 4px);
}

.s17-text strong {
  font-weight: 800;
  color: #222;
}

.s17-card:hover {
  transform: translateY(-4px);
}

.s17-stars {
  font-size: clamp(16px, 1.3vw, 24px);
  color: #ffc107;
  margin-bottom: clamp(8px, 0.8vw, 16px);
}

.s17-text {
  font-size: var(--fs-small);
  line-height: 1.7;
  color: #444;
  margin-bottom: clamp(10px, 1vw, 20px);
}

.s17-author {
  font-size: clamp(11px, 0.73vw, 14px);
  font-weight: 700;
  color: #888;
  text-align: right;
}

/* ============================================================
   SECTION 18: Lock Feature
   ============================================================ */
.section-18 {
  background: linear-gradient(180deg, var(--dark-purple-start) 0%, var(--dark-purple-end) 58%, #fff 58%);
  position: relative;
  overflow: hidden;
  min-height: auto;
}

/* Starry sky decorations */
.section-18::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 58%;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 10% 15%, rgba(255,255,255,0.8), transparent),
    radial-gradient(1px 1px at 25% 8%, rgba(255,255,255,0.6), transparent),
    radial-gradient(2px 2px at 40% 20%, rgba(255,255,255,0.9), transparent),
    radial-gradient(1px 1px at 55% 12%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 70% 25%, rgba(255,255,255,0.7), transparent),
    radial-gradient(2px 2px at 85% 10%, rgba(255,255,255,0.8), transparent),
    radial-gradient(1px 1px at 15% 35%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 35% 40%, rgba(255,255,255,0.5), transparent),
    radial-gradient(2px 2px at 60% 38%, rgba(255,255,255,0.7), transparent),
    radial-gradient(1px 1px at 80% 42%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 5% 48%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1.5px 1.5px at 92% 30%, rgba(255,255,255,0.8), transparent),
    radial-gradient(1px 1px at 48% 5%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1.5px 1.5px at 75% 18%, rgba(255,255,255,0.7), transparent),
    radial-gradient(1px 1px at 20% 50%, rgba(255,255,255,0.5), transparent),
    radial-gradient(2px 2px at 95% 48%, rgba(255,255,255,0.6), transparent);
}

.s18-emoji {
  font-size: 1.1em;
  margin-right: clamp(4px, 0.3vw, 8px);
}

/* Curved transition between dark and light */
.section-18::after {
  content: '';
  position: absolute;
  top: 53%;
  left: -5%;
  right: -5%;
  height: 12%;
  background: #fff;
  border-radius: 50% 50% 0 0;
  z-index: 1;
}

.section-18 .section-inner {
  text-align: center;
  color: #fff;
  position: relative;
  z-index: 2;
}

.s18-header p {
  font-family: var(--font-display);
  font-size: var(--fs-subtitle);
  line-height: 1.4;
  background: linear-gradient(180deg, #cfe8ff, #09d3ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.s18-worry {
  font-family: var(--font-display);
  font-size: var(--fs-large);
  color: #fff;
  margin: clamp(10px, 1vw, 20px) 0 clamp(20px, 2vw, 40px);
  text-shadow: 0px 4px 4px rgba(0, 0, 0, 0.25);
}

.s18-lock-screen {
  max-width: clamp(300px, 28vw, 540px);
  margin: 0 auto clamp(20px, 2vw, 40px);
  position: relative;
}

.s18-lock-img {
  border-radius: clamp(14px, 1.04vw, 20px);
  box-shadow: 0px 0px 95px rgba(255, 255, 255, 0.25);
}

.s18-lock-icon {
  position: absolute;
  right: clamp(-24px, -2.5vw, -48px);
  bottom: clamp(-12px, -1.2vw, -24px);
  font-size: clamp(36px, 3.6vw, 70px);
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.2));
}

.s18-lock-info {
  color: #333;
}

.s18-lock-title {
  font-family: var(--font-display);
  font-size: var(--fs-subtitle);
  color: #4d2ba3;
  margin-bottom: clamp(6px, 0.5vw, 10px);
}

.s18-lock-highlight {
  position: relative;
  display: inline;
}
.s18-lock-highlight::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: clamp(10px, 1.09vw, 21px);
  background: #ffde6a;
  z-index: -1;
}

.s18-lock-desc {
  font-size: var(--fs-body-lg);
  color: #4d2ba3;
}

/* ============================================================
   SECTION 19: Onboarding / Contact
   ============================================================ */
.section-19 {
  background: linear-gradient(180deg, #e8f4fa 0%, #f0f8fc 100%);
  position: relative;
  min-height: auto;
}

/* Cloud decorations at bottom corners */
.section-19::before,
.section-19::after {
  content: '';
  position: absolute;
  bottom: 0;
  width: clamp(100px, 12vw, 240px);
  height: clamp(50px, 6vw, 120px);
  background: rgba(255, 255, 255, 0.6);
  border-radius: 50% 50% 0 0;
  z-index: 0;
}

.section-19::before {
  left: clamp(10px, 3vw, 60px);
}

.section-19::after {
  right: clamp(10px, 3vw, 60px);
}

.section-19 .section-inner {
  text-align: center;
  position: relative;
  z-index: 1;
}

.s19-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  color: #5351bc;
  margin-bottom: clamp(24px, 2.5vw, 48px);
}

.s19-process {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(4px, 0.5vw, 10px);
  flex-wrap: wrap;
  margin-bottom: clamp(36px, 3.6vw, 70px);
  background: #fff;
  border-radius: clamp(40px, 4.17vw, 80px);
  padding: clamp(20px, 2vw, 40px) clamp(16px, 1.5vw, 28px);
  box-shadow: 0px 4px 55px rgba(0, 0, 0, 0.2);
}

.s19-step-item {
  flex-shrink: 0;
}

.s19-step-circle {
  width: clamp(84px, 8.33vw, 160px);
  height: clamp(84px, 8.33vw, 160px);
  border-radius: 50%;
  background: linear-gradient(135deg, #7ecaf2, #5ab0e0);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(8px, 0.8vw, 16px);
  transition: transform 0.3s ease;
  border: 3px dashed rgba(255, 255, 255, 0.5);
}

.s19-step-circle:hover {
  transform: scale(1.08);
}

.s19-step-circle span {
  font-size: clamp(10px, 0.73vw, 14px);
  font-weight: 700;
  color: #fff;
  text-align: center;
  line-height: 1.3;
}

.s19-step-arrow {
  font-size: clamp(16px, 1.3vw, 24px);
  color: var(--primary);
  flex-shrink: 0;
}

.s19-contact-title {
  font-family: var(--font-display);
  font-size: var(--fs-subtitle);
  color: #5351bc;
  margin-bottom: clamp(16px, 1.5vw, 30px);
}

.s19-contact-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(16px, 1.5vw, 30px);
}

.s19-contact-info {
  display: flex;
  flex-direction: column;
  gap: clamp(10px, 1vw, 20px);
  background: #fff;
  border-radius: clamp(12px, 1vw, 20px);
  padding: clamp(20px, 2vw, 40px) clamp(32px, 3vw, 60px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  max-width: 100%;
  box-sizing: border-box;
}

.s19-contact-row {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1vw, 20px);
  font-size: var(--fs-body);
}

.s19-label {
  font-weight: 700;
  color: var(--primary);
  min-width: clamp(60px, 5vw, 100px);
  text-align: right;
}

.s19-contact-row a {
  color: var(--blue);
  transition: color 0.2s ease;
}

.s19-partner-btn {
  display: block;
  margin: 0 auto;
  background: linear-gradient(135deg, #ffcf76 0%, #ffb347 100%);
  border: none;
  border-radius: clamp(16px, 1.4vw, 30px);
  padding: clamp(12px, 1.2vw, 22px) clamp(32px, 3vw, 60px);
  font-size: clamp(16px, 1.4vw, 26px);
  font-weight: 700;
  color: #333;
  cursor: pointer;
  font-family: var(--font-body);
  box-shadow: 0 4px 16px rgba(255, 179, 71, 0.35);
  transition: transform 0.2s, box-shadow 0.2s;
}

.s19-partner-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(255, 179, 71, 0.5);
}

.s19-contact-row a:hover {
  color: var(--purple);
  text-decoration: underline;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: #1a2332;
  color: rgba(255, 255, 255, 0.7);
  padding: clamp(24px, 2.5vw, 48px) clamp(20px, 3vw, 60px);
}

.footer-inner {
  max-width: min(var(--max-w), 100%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: clamp(12px, 1.2vw, 24px);
  box-sizing: border-box;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 4px;
}

.footer-logo-mark {
  height: clamp(18px, 1.5vw, 22px);
  width: auto;
  opacity: 0.7;
}

.footer-logo-text {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: clamp(10px, 0.75vw, 13px);
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 1px;
  line-height: 1;
}

.footer-logo-divider {
  width: 1px;
  height: clamp(16px, 1.3vw, 20px);
  background: rgba(255, 255, 255, 0.3);
  margin: 0 6px;
  flex-shrink: 0;
}

.footer-logo-witty {
  height: clamp(22px, 1.8vw, 30px);
  width: auto;
  opacity: 0.7;
}

.footer-links {
  display: flex;
  gap: clamp(16px, 1.5vw, 30px);
}

.footer-links a {
  font-size: clamp(11px, 0.73vw, 14px);
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #fff;
}

.footer-copyright {
  font-size: clamp(10px, 0.65vw, 12px);
  opacity: 0.5;
}

/* ============================================================
   SCROLL TO TOP BUTTON
   ============================================================ */
.scroll-top-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 800;
  box-shadow: 0 4px 16px rgba(37, 136, 149, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.scroll-top-btn.show {
  opacity: 1;
  visibility: visible;
}

.scroll-top-btn:hover {
  background: var(--teal-dark);
  transform: translateY(-2px);
}

/* ============================================================
   RESPONSIVE: Tablet (768px - 1199px)
   ============================================================ */
@media (max-width: 1199px) {
  .section {
    min-height: auto;
  }

  .section-sidebar {
    display: none;
  }

  /* S01 */
  .s01-characters {
    max-width: 80%;
  }

  /* S03 */
  .s03-circle-container {
    min-height: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }

  .s03-step {
    position: static;
    width: 100%;
    text-align: center !important;
    transform: none;
    left: auto;
    right: auto;
  }

  .s03-center-label {
    position: static;
    transform: none;
    margin: 0 auto 20px;
  }

  .s03-bubble {
    position: static;
    max-width: 100%;
    margin-top: 16px;
  }

  /* S04 */
  .s04-grid {
    grid-template-columns: repeat(4, 1fr);
    max-width: 100%;
  }

  /* S07-08 */
  .sce-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* S09 */
  .s09-levels {
    gap: 12px;
  }

  .s09-level {
    width: 200px;
  }

  /* S10 */
  .s10-level {
    width: 200px;
  }

  /* S11 */
  .s11-grid {
    gap: 24px;
  }

  /* S12 */
  .s12-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* S13 */
  .s13-content-area {
    flex-direction: column;
    gap: 20px;
  }

  .s13-features {
    width: min(clamp(280px, 50vw, 460px), 100%);
  }

  .s13-report {
    max-width: min(clamp(300px, 60vw, 540px), 100%);
  }

  /* S14 */
  .s14-cards {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .s14-cards .s14-card:last-child {
    grid-column: 1 / -1;
    max-width: 400px;
    margin: 0 auto;
  }

  /* S17 */
  .s17-reviews {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .s17-reviews .s17-card:last-child {
    grid-column: 1 / -1;
    max-width: 400px;
    margin: 0 auto;
  }

  /* S19 */
  .s19-process {
    gap: 8px;
    padding: 20px;
  }

  .s19-step-circle {
    width: 90px;
    height: 90px;
  }
}

/* ============================================================
   RESPONSIVE: Mobile (< 768px)
   ============================================================ */
@media (max-width: 767px) {
  :root {
    --section-py: 40px;
    --section-px: 16px;
    --fs-huge: clamp(28px, 8vw, 44px);
    --fs-large: clamp(22px, 6.5vw, 36px);
    --fs-section: clamp(20px, 5.5vw, 32px);
    --fs-subtitle: clamp(16px, 4.5vw, 26px);
    --fs-body-lg: clamp(14px, 3.8vw, 22px);
    --fs-body: clamp(13px, 3.5vw, 18px);
    --fs-small: clamp(11px, 3vw, 15px);
  }

  .section {
    min-height: auto;
  }

  .section-01 {
    min-height: 100vh;
    min-height: 100svh;
  }

  .nav-inner {
    padding: 0 12px;
    gap: 10px;
  }

  .lang-toggle {
    padding: 2px 6px;
    border-radius: 18px;
  }

  .lang-select {
    min-width: 130px;
    padding: 5px 8px;
    font-size: 12px;
  }

  /* S01 */
  .s01-characters {
    max-width: 100%;
    gap: 0;
  }

  .s01-char-duck { width: 80px; margin-right: -10px; }
  .s01-char-pear { width: 90px; margin-right: -5px; }
  .s01-char-otter { width: 130px; }
  .s01-char-wolf { width: 110px; margin-left: -5px; }

  .s01-lightbulb { width: 60px; }
  .s01-star-red { width: 16px; height: 16px; }
  .s01-star-dark { width: 12px; height: 12px; }
  .s01-puzzle { width: 24px; height: 24px; }

  /* S02 */
  .s02-screenshots {
    flex-direction: column;
    gap: 12px;
  }

  .s02-screen-left,
  .s02-screen-right {
    max-width: 100%;
    min-width: 0;
  }

  .s02-arrow {
    transform: rotate(90deg);
  }

  /* S03 */
  .s03-circle-container {
    min-height: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
  }

  .s03-step {
    position: static;
    width: 100%;
    text-align: center !important;
    transform: none;
    left: auto;
    right: auto;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 12px;
    padding: 16px;
  }

  .s03-center-label {
    position: static;
    transform: none;
    margin: 0 auto 16px;
    width: 120px;
    height: 120px;
    font-size: 14px;
  }

  .s03-bubble {
    position: static;
    max-width: 100%;
    margin-top: 12px;
  }

  /* S04 */
  .s04-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px 12px;
    max-width: 100%;
  }

  .s04-icon {
    width: 70px;
    height: auto;
  }

  /* S05 */
  .s05-char-left,
  .s05-char-right {
    width: 100px;
  }

  .s05-char-br,
  .s05-char-bl {
    width: 60px;
  }

  /* S06 */
  .s06-circle-pink,
  .s06-star-yellow,
  .s06-square-yellow,
  .s06-triangle-green {
    display: none;
  }

  .s06-device {
    max-width: 100%;
  }

  /* S07-08 */
  .sce-content {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .s07-character,
  .s08-character,
  .s09-character,
  .s10-character,
  .s12-character,
  .s13-character,
  .s16-characters {
    display: none;
  }

  /* S09 */
  .s09-levels {
    flex-direction: column;
    align-items: center;
  }

  .s09-level {
    width: 100%;
    max-width: 300px;
  }

  .s09-arrow {
    transform: rotate(90deg);
  }

  /* S10 */
  .s10-levels {
    flex-direction: column;
    align-items: center;
  }

  .s10-level {
    width: 100%;
    max-width: 300px;
  }

  /* S11 */
  .s11-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* S12 */
  .s12-content {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .s12-chart-bars {
    height: 140px;
  }

  .s12-bar span {
    font-size: 7px;
  }

  /* S13 */
  .s13-content-area {
    flex-direction: column;
    gap: 16px;
  }

  .s13-features {
    gap: 16px;
    width: 100%;
    max-width: 300px;
    height: auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    position: static;
  }

  .s13-circle {
    width: 110px;
    height: 110px;
    position: static;
  }

  .s13-report {
    max-width: 100%;
  }

  .s13-arrow {
    transform: rotate(90deg);
  }

  /* S14 */
  .s14-cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .s14-cards .s14-card:last-child {
    max-width: 100%;
  }

  /* S15 */
  .s15-photos {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* S16 */
  .s16-cell-left,
  .s16-cell-right {
    padding: 10px 8px;
  }

  /* S17 */
  .s17-reviews {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .s17-reviews .s17-card:last-child {
    max-width: 100%;
  }

  /* S18 */
  .s18-lock-icon {
    right: -12px;
    bottom: -10px;
    font-size: 32px;
  }

  /* S19 */
  .s19-process {
    flex-direction: column;
    gap: 8px;
    padding: 16px;
  }

  .s19-step-circle {
    width: 80px;
    height: 80px;
  }

  .s19-step-arrow {
    transform: rotate(90deg);
  }

  .s19-contact-info {
    width: 100%;
    padding: 20px;
  }

  .s19-contact-cta {
    width: 100%;
  }

  .s19-contact-row {
    flex-direction: column;
    gap: 4px;
    text-align: center;
  }

  .s19-label {
    text-align: center;
    min-width: auto;
  }

  .s19-partner-btn {
    width: 100%;
    max-width: 340px;
  }

  /* Footer */
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    flex-direction: column;
    gap: 10px;
  }
}

/* ============================================================
   RESPONSIVE: Small Mobile (< 480px)
   ============================================================ */
@media (max-width: 479px) {
  :root {
    --fs-huge: clamp(24px, 7vw, 36px);
    --fs-large: clamp(20px, 5.5vw, 30px);
    --fs-section: clamp(18px, 5vw, 26px);
    --fs-subtitle: clamp(15px, 4vw, 22px);
    --fs-body-lg: clamp(13px, 3.5vw, 18px);
    --fs-body: clamp(12px, 3.2vw, 16px);
    --fs-small: clamp(10px, 2.8vw, 14px);
  }

  .s01-characters {
    max-width: 100%;
  }

  .s01-char-duck { width: 60px; }
  .s01-char-pear { width: 70px; }
  .s01-char-otter { width: 100px; }
  .s01-char-wolf { width: 85px; }

  .s04-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px 8px;
  }

  .lang-select {
    min-width: 112px;
    font-size: 11px;
    padding: 4px 6px;
  }

  .s04-icon {
    width: 56px;
    height: auto;
  }

  .s13-circle {
    width: 90px;
    height: 90px;
  }

  .s19-step-circle {
    width: 70px;
    height: 70px;
  }

  .s19-step-circle span {
    font-size: 9px;
  }
}

/* ============================================================
   RESPONSIVE: Portrait / Tall Viewport
   ============================================================ */
@media (max-aspect-ratio: 3/4) {
  .s01-text {
    margin-bottom: clamp(16px, 3vh, 40px);
  }
}

@media (max-aspect-ratio: 9/16) {
  .s01-text {
    margin-bottom: clamp(12px, 2vh, 24px);
  }
}

@media (orientation: portrait) {
  :root {
    --nav-height: 104px;
  }

  .nav-inner {
    height: auto;
    min-height: var(--nav-height);
    padding: 8px 10px 10px;
    flex-wrap: wrap;
    row-gap: 8px;
  }

  .nav-logo {
    gap: 7px;
  }

  .nav-logo-mark {
    height: 22px;
  }

  .nav-logo-text {
    font-size: 13px;
    letter-spacing: 1.1px;
  }

  .nav-logo-divider {
    height: 18px;
    margin: 0 5px;
  }

  .nav-logo-witty {
    height: 28px;
  }

  .nav-controls {
    gap: 6px;
  }

  .lang-select {
    min-width: 104px;
    padding: 5px 7px;
    font-size: 11px;
  }

  .nav-quick-links {
    display: flex;
    order: 3;
    flex: 0 0 100%;
    justify-content: center;
    flex-wrap: wrap;
    gap: 6px;
    margin: 0;
  }

  .nav-quick-link {
    padding: 6px 10px;
    font-size: 11px;
  }
}

/* Pricing UX for portrait: quick compare first, readable cards below */
@media (orientation: portrait) and (max-width: 1024px) {
  .s14-quick-compare {
    display: block;
    margin: 0 auto clamp(14px, 1.4vh, 18px);
    max-width: min(100%, 980px);
    text-align: left;
  }

  .s14-quick-title {
    font-family: var(--font-display);
    font-size: clamp(14px, 1.8vh, 18px);
    color: #2f7eb8;
    margin-bottom: 8px;
  }

  .s14-quick-grid {
    border: 1px solid rgba(47, 126, 184, 0.2);
    border-radius: 14px;
    overflow: hidden;
    background: #f8fcff;
  }

  .s14-quick-row {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr 1fr;
  }

  .s14-quick-cell {
    padding: 8px 6px;
    font-size: clamp(10px, 1.3vh, 13px);
    font-weight: 600;
    color: #365163;
    text-align: center;
    border-top: 1px solid rgba(47, 126, 184, 0.14);
    border-right: 1px solid rgba(47, 126, 184, 0.12);
    background: #ffffff;
    line-height: 1.3;
  }

  .s14-quick-row .s14-quick-cell:last-child {
    border-right: none;
  }

  .s14-quick-head .s14-quick-cell {
    border-top: none;
    background: rgba(47, 126, 184, 0.1);
    color: #215579;
    font-weight: 800;
  }

  .s14-quick-label {
    text-align: left;
    padding-left: 10px;
    background: #edf7ff;
    font-weight: 800;
    color: #2d648b;
  }

  .s14-cards {
    padding: 0;
  }

  .s14-cards .s14-card:last-child {
    grid-column: auto;
    max-width: none;
    margin: 0;
  }
}

@media (orientation: portrait) and (min-width: 768px) and (max-width: 1024px) {
  .s14-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .s14-card {
    padding: 16px 12px;
  }

  .s14-card-badge {
    margin-bottom: 8px;
    font-size: clamp(10px, 1.1vh, 12px);
  }

  .s14-billing {
    margin-bottom: 6px;
    font-size: clamp(9px, 1vh, 11px);
  }

  .s14-price {
    margin-bottom: 10px;
  }

  .s14-price-num {
    font-size: clamp(17px, 1.9vh, 24px);
  }

  .s14-features li {
    font-size: clamp(10px, 1vh, 12px);
    line-height: 1.35;
    margin-bottom: 6px;
  }
}

@media (orientation: portrait) and (max-width: 767px) {
  .s14-subtitle {
    margin-bottom: 14px;
  }

  .s14-cards {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .s14-card {
    padding: 16px 14px;
  }

  .s14-cards .s14-card:last-child {
    max-width: 100%;
  }
}

/* ============================================================
   SECTION 20: 발달확인보고서 (Brain Report)
   ============================================================ */
.section-20 {
  background: #ffffff;
}

.section-20 .section-inner {
  text-align: center;
}

.s20-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  color: #ff6b7d;
  margin-bottom: clamp(30px, 3vw, 60px);
}

/* Three pink circles */
.s20-circles {
  display: flex;
  justify-content: center;
  gap: clamp(20px, 3vw, 60px);
  margin-bottom: clamp(16px, 1.5vw, 30px);
  flex-wrap: wrap;
}

.s20-circle-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: clamp(160px, 14vw, 260px);
}

.s20-circle {
  width: clamp(150px, 13vw, 250px);
  height: clamp(150px, 13vw, 250px);
  border-radius: 50%;
  background: linear-gradient(135deg, #fff0f2 0%, #ffe0e4 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: clamp(16px, 1.5vw, 30px);
  transition: transform 0.3s ease;
  box-shadow: 0 4px 20px rgba(255, 107, 125, 0.15);
}

.s20-circle:hover {
  transform: scale(1.06);
}

.s20-circle img {
  width: clamp(60px, 5.5vw, 110px);
  height: clamp(60px, 5.5vw, 110px);
  margin-bottom: clamp(4px, 0.4vw, 8px);
}

.s20-circle-label {
  font-size: clamp(14px, 1.2vw, 22px);
  font-weight: 800;
  color: #ff6b7d;
  line-height: 1.3;
  text-align: center;
}

/* Tooltip */
.s20-tooltip {
  display: inline-block;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 0 8.5px rgba(0, 0, 0, 0.25);
  padding: clamp(10px, 1vw, 18px) clamp(14px, 1.2vw, 22px);
  margin-bottom: clamp(20px, 2vw, 40px);
  max-width: clamp(240px, 18vw, 320px);
  text-align: left;
}

.s20-tooltip-title {
  font-size: clamp(12px, 0.9vw, 16px);
  font-weight: 800;
  color: #ff6b7d;
  margin-bottom: 4px;
}

.s20-tooltip-text {
  font-size: clamp(10px, 0.75vw, 14px);
  color: #333;
  line-height: 1.5;
}

/* Description */
.s20-desc {
  font-size: clamp(14px, 1.3vw, 26px);
  color: #3c3435;
  line-height: 1.8;
  max-width: clamp(500px, 45vw, 860px);
  margin: 0 auto clamp(30px, 3vw, 60px);
  text-align: center;
}

.s20-desc strong {
  font-weight: 800;
  color: #ff6b7d;
}

.s20-desc .s20-bold-dark {
  font-weight: 700;
  color: #222;
}

/* Report card */
.s20-report-card {
  background: #fff2f2;
  border-radius: clamp(20px, 2vw, 40px);
  box-shadow: 0 50px 36.5px rgba(0, 0, 0, 0.15);
  padding: clamp(30px, 3vw, 60px);
  max-width: clamp(500px, 42vw, 800px);
  margin: 0 auto;
  text-align: center;
}

.s20-report-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  color: #ff6b7d;
  margin-bottom: clamp(16px, 1.5vw, 30px);
}

.s20-report-images {
  display: flex;
  gap: clamp(10px, 1vw, 20px);
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
}

.s20-report-img {
  border-radius: clamp(10px, 1vw, 20px);
  box-shadow: 0 0 57px rgba(0, 0, 0, 0.25);
  max-width: clamp(200px, 20vw, 380px);
  width: 48%;
}

.s20-report-img:nth-child(2) {
  box-shadow: 0 4px 39.8px rgba(0, 0, 0, 0.25);
  border-radius: clamp(16px, 1.5vw, 34px);
  margin-top: clamp(40px, 4vw, 80px);
}

/* Bottom red band */
.s20-bottom-band {
  background: #ff6b7d;
  width: 100%;
  height: clamp(100px, 10vw, 200px);
  position: absolute;
  bottom: 0;
  left: 0;
}

/* ============================================================
   SECTION 21: 개발연구진 (R&D Team)
   ============================================================ */
.section-21 {
  background: linear-gradient(180deg, #ff6b7d 34.6%, #bd1515 56.5%);
  min-height: auto;
}

.section-21 .section-inner {
  text-align: center;
}

.s21-title {
  font-family: var(--font-body);
  font-size: var(--fs-section);
  font-weight: 800;
  color: #fff;
  margin-bottom: clamp(24px, 2.5vw, 50px);
}

.s21-icons {
  position: relative;
  max-width: clamp(500px, 48vw, 900px);
  margin: 0 auto clamp(24px, 2.5vw, 48px);
}

.s21-curve-line {
  position: absolute;
  top: clamp(20px, 2vw, 40px);
  left: 50%;
  transform: translateX(-50%);
  width: 72%;
  height: clamp(60px, 5.5vw, 110px);
  object-fit: contain;
  z-index: 0;
}

.s21-icon-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 1;
}

.s21-icon-item {
  width: clamp(70px, 6.5vw, 130px);
  height: clamp(70px, 6.5vw, 130px);
}

.s21-icon-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}

.s21-role-row {
  display: flex;
  justify-content: space-between;
  margin-top: clamp(12px, 1.2vw, 24px);
  position: relative;
  z-index: 1;
}

.s21-role {
  flex: 1;
  font-size: clamp(12px, 1.1vw, 20px);
  font-weight: 600;
  color: rgba(255,255,255,0.92);
  line-height: 1.5;
  padding: 0 clamp(4px, 0.4vw, 8px);
}

.s21-dots {
  margin: clamp(12px, 1vw, 20px) auto;
  width: clamp(4px, 0.3vw, 7px);
}

.s21-bottom-text {
  font-size: clamp(18px, 1.8vw, 34px);
  font-weight: 800;
  color: #fff;
  line-height: 1.6;
  max-width: clamp(400px, 32vw, 620px);
  margin: 0 auto;
}

/* ============================================================
   SECTION 22: 추천 (Recommendations)
   ============================================================ */
.section-22 {
  background: #ffe880;
}

.section-22 .section-inner {
  text-align: center;
}

.s22-header-card {
  background: linear-gradient(4deg, #fff 15.2%, #f7f7f7 22.9%);
  border-radius: clamp(16px, 1.5vw, 33px);
  box-shadow: 7px 9px 20.6px rgba(0, 0, 0, 0.25);
  padding: clamp(24px, 2.5vw, 50px) clamp(30px, 3vw, 60px);
  display: inline-block;
  margin-bottom: clamp(24px, 2.5vw, 50px);
}

.s22-header-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  color: #573822;
  margin-bottom: clamp(4px, 0.4vw, 8px);
}

.s22-header-subtitle {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.3vw, 64px);
  color: #573822;
}

.s22-cards {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(12px, 1.2vw, 25px);
  max-width: clamp(400px, 35vw, 680px);
  margin: 0 auto clamp(20px, 2vw, 40px);
}

.s22-card {
  display: flex;
  align-items: center;
  background: #fff;
  border-radius: clamp(30px, 2.6vw, 50px);
  padding: clamp(16px, 1.5vw, 28px) clamp(20px, 2vw, 40px);
  width: 100%;
  gap: clamp(14px, 1.2vw, 24px);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.s22-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.s22-card-icon {
  width: clamp(40px, 3.5vw, 70px);
  height: clamp(40px, 3.5vw, 70px);
  flex-shrink: 0;
}

.s22-card-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.s22-card-text {
  font-size: clamp(14px, 1.3vw, 26px);
  font-weight: 700;
  color: #333;
  text-align: left;
}

.s22-card-text .s22-highlight {
  font-weight: 800;
  color: #fc7c1f;
}

.s22-footer {
  font-size: clamp(12px, 1vw, 20px);
  font-weight: 800;
  color: #8a8a8a;
}

/* ============================================================
   기관 제휴 문의 팝업 (Partnership Inquiry Popup)
   ============================================================ */
.popup-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.popup-overlay.active {
  display: flex;
}

.popup-container {
  background: #fff;
  border-radius: clamp(20px, 2vw, 40px);
  width: min(90vw, 640px);
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 50px 36.5px rgba(0, 0, 0, 0.15);
  padding: clamp(30px, 3vw, 60px) clamp(24px, 2.5vw, 50px);
}

.popup-close {
  position: absolute;
  top: clamp(12px, 1.2vw, 24px);
  left: clamp(12px, 1.2vw, 24px);
  width: clamp(36px, 3vw, 56px);
  height: clamp(36px, 3vw, 56px);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  z-index: 1;
}

.popup-close img {
  width: 100%;
  height: 100%;
}

.popup-header {
  text-align: center;
  margin-bottom: clamp(20px, 2vw, 40px);
}

.popup-icon {
  width: clamp(36px, 3vw, 56px);
  margin: 0 auto clamp(8px, 0.8vw, 16px);
}

.popup-title {
  font-size: clamp(22px, 2.2vw, 42px);
  font-weight: 800;
  color: #000;
  line-height: 1.4;
  margin-bottom: clamp(8px, 0.8vw, 16px);
}

.popup-subtitle {
  font-size: clamp(12px, 1vw, 18px);
  font-weight: 800;
  color: #fc7c1f;
}

.popup-form {
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 1.5vw, 28px);
}

.popup-field label {
  display: block;
  font-size: clamp(14px, 1.3vw, 26px);
  font-weight: 800;
  color: #000;
  margin-bottom: clamp(6px, 0.5vw, 10px);
}

.popup-field input,
.popup-field select {
  width: 100%;
  height: clamp(40px, 3.5vw, 56px);
  border: 2px solid #000;
  border-radius: clamp(16px, 1.4vw, 30px);
  padding: 0 clamp(14px, 1.2vw, 24px);
  font-size: clamp(12px, 1vw, 20px);
  font-family: var(--font-body);
  color: #333;
  background: #fff;
  outline: none;
  transition: border-color 0.2s;
}

.popup-field input::placeholder {
  color: #8a8a8a;
}

.popup-field input:focus,
.popup-field select:focus {
  border-color: #fc7c1f;
}

.popup-submit {
  display: block;
  margin: clamp(8px, 1vw, 16px) auto 0;
  background: #ffcf76;
  border: 2px solid #ffcf76;
  border-radius: clamp(16px, 1.4vw, 30px);
  padding: clamp(10px, 1vw, 18px) clamp(28px, 2.5vw, 50px);
  font-size: clamp(14px, 1.2vw, 22px);
  font-weight: 700;
  color: #000;
  cursor: pointer;
  font-family: var(--font-body);
  transition: background 0.2s, transform 0.2s;
}

.popup-submit:hover {
  background: #ffc14d;
  transform: translateY(-2px);
}

.popup-copyright {
  text-align: center;
  font-size: clamp(10px, 0.8vw, 16px);
  font-weight: 800;
  color: #8a8a8a;
  margin-top: clamp(16px, 1.5vw, 30px);
}

/* Popup decorative characters */
.popup-decor {
  position: absolute;
  pointer-events: none;
}

.popup-decor-tl { top: -5%; left: -8%; width: clamp(80px, 8vw, 160px); opacity: 0.8; }
.popup-decor-tr { top: -5%; right: -10%; width: clamp(100px, 10vw, 200px); opacity: 0.8; }
.popup-decor-bl { bottom: -5%; left: -5%; width: clamp(80px, 8vw, 160px); opacity: 0.8; }
.popup-decor-br { bottom: -3%; right: -5%; width: clamp(60px, 6vw, 120px); opacity: 0.8; }

/* ============================================================
   PRINT STYLES
   ============================================================ */
@media print {
  .nav-bar,
  .section-sidebar,
  .scroll-progress,
  .scroll-top-btn {
    display: none !important;
  }

  .main-content {
    padding-top: 0;
  }

  .section {
    min-height: auto !important;
    break-inside: avoid;
  }

  .section .section-inner {
    opacity: 1 !important;
    transform: none !important;
  }
}