/* ============================================
   キープオン LP — Style Sheet
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --blue: #1976D2;
  --blue-dark: #0D47A1;
  --blue-deeper: #0A1628;
  --blue-light: #E3F2FD;
  --orange: #F4511E;
  --orange-light: #FF7043;
  --yellow: #FFC107;
  --yellow-light: #FFF8E1;
  --green: #43A047;
  --green-light: #E8F5E9;
  --pink: #E91E63;
  --pink-light: #FCE4EC;

  --white: #FFFFFF;
  --gray-50: #FAFBFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;

  --font-ja: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  --font-en: "Montserrat", var(--font-ja);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --header-h: 72px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-ja);
  font-size: 16px;
  line-height: 1.8;
  color: var(--gray-800);
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

address {
  font-style: normal;
}

cite {
  font-style: normal;
}

strong {
  font-weight: 700;
}

.sp-only {
  display: none;
}

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Section ---------- */
.section {
  padding: 100px 0;
}

.section--alt {
  background: var(--gray-50);
}

.section--dark {
  background: linear-gradient(160deg, var(--gray-900) 0%, var(--blue-deeper) 100%);
  color: var(--white);
}

.section__header {
  text-align: center;
  margin-bottom: 60px;
}

.section__label {
  display: inline-block;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--blue);
  background: var(--blue-light);
  padding: 4px 16px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section__label--light {
  color: var(--yellow);
  background: rgba(255, 193, 7, 0.15);
}

.section__title {
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.4;
  letter-spacing: -0.02em;
  color: var(--gray-900);
}

.section__title--light {
  color: var(--white);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-ja);
  font-weight: 700;
  border: none;
  border-radius: 100px;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn--cta {
  background: linear-gradient(135deg, var(--orange) 0%, var(--orange-light) 100%);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(244, 81, 30, 0.35);
}

.btn--cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(244, 81, 30, 0.45);
}

.btn--cta:active {
  transform: translateY(0);
}

.btn--blue {
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 100%);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(25, 118, 210, 0.3);
}

.btn--blue:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(25, 118, 210, 0.4);
}

.btn--blue:active {
  transform: translateY(0);
}

.btn--sm {
  font-size: 0.85rem;
  padding: 10px 24px;
}

.btn--lg {
  font-size: 1.05rem;
  padding: 16px 40px;
}

.btn--xl {
  font-size: 1.2rem;
  padding: 20px 52px;
}

.btn__arrow {
  width: 20px;
  height: 20px;
  transition: transform var(--transition);
}

.btn:hover .btn__arrow {
  transform: translateX(4px);
}

/* ---------- Image Placeholders ---------- */
.img-placeholder {
  position: relative;
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.img-placeholder--hero {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 40%, #42A5F5 100%);
}

.img-placeholder--card {
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--gray-200) 0%, var(--gray-100) 100%);
}

.img-placeholder--rect {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--gray-200) 0%, var(--gray-100) 100%);
}

.img-placeholder__inner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.img-placeholder__icon {
  width: 48px;
  height: 48px;
  color: var(--gray-300);
}

.img-placeholder--hero .img-placeholder__icon {
  color: rgba(255, 255, 255, 0.3);
  width: 64px;
  height: 64px;
}

.img-placeholder__name {
  font-family: var(--font-en);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gray-400);
  background: rgba(255, 255, 255, 0.7);
  padding: 4px 12px;
  border-radius: 100px;
}

.img-placeholder--hero .img-placeholder__name {
  color: rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.1);
}

/* ---------- HEADER ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  transition: box-shadow var(--transition);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo img {
  height: 44px;
  width: auto;
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--header-h);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 50%, #42A5F5 100%);
}

.hero__video-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero__video-wrap iframe {
  position: absolute;
  top: 50%;
  left: 50%;
  /* 縦に10%拡大してコントロールバーをoverflow:hiddenで隠す */
  width: 110vw;
  height: 110vh;
  min-width: 195.56vh; /* 177.78vh × 1.1 */
  min-height: 61.875vw; /* 56.25vw × 1.1 */
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 22, 40, 0.65) 0%,
    rgba(10, 22, 40, 0.45) 50%,
    rgba(10, 22, 40, 0.7) 100%
  );
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--white);
  padding-top: 40px;
  padding-bottom: 60px;
}

.hero__school {
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  opacity: 0.85;
  margin-bottom: 20px;
}

.hero__title {
  font-family: "Shippori Mincho B1", "Noto Serif JP", "YuMincho", "Yu Mincho", serif;
  font-size: 5rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.06em;
  margin-bottom: 28px;
  color: var(--white);
  text-shadow: 0 2px 28px rgba(0, 0, 0, 0.4);
}

/* --- Hero character animation --- */
.hero__char {
  display: inline-block;
  opacity: 0;
  animation: heroCharIn 0.55s cubic-bezier(0.34, 1.3, 0.64, 1) forwards;
}

@keyframes heroCharIn {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero reveal helper for copy / CTA */
.hero__fade-hidden {
  opacity: 0 !important;
  transform: translateY(20px);
}

.hero__copy {
  font-size: 1.45rem;
  font-weight: 500;
  line-height: 1.7;
  margin-bottom: 40px;
  opacity: 0.92;
}

.hero__copy strong {
  color: var(--yellow);
  -webkit-text-fill-color: var(--yellow);
}

.hero__deco {
  position: absolute;
  border-radius: 50%;
  z-index: 1;
  pointer-events: none;
}

.hero__deco--1 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(25, 118, 210, 0.15) 0%, transparent 70%);
  top: 10%;
  right: -80px;
}

.hero__deco--2 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(244, 81, 30, 0.12) 0%, transparent 70%);
  bottom: 15%;
  left: -60px;
}

.hero__deco--3 {
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(255, 193, 7, 0.12) 0%, transparent 70%);
  top: 30%;
  left: 10%;
}

/* ---------- FEATURES ---------- */
.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.feature-card__accent {
  height: 4px;
}

.feature-card__accent--blue {
  background: linear-gradient(90deg, var(--blue-dark), var(--blue));
}

.feature-card__accent--orange {
  background: linear-gradient(90deg, var(--orange), var(--orange-light));
}

.feature-card__accent--green {
  background: linear-gradient(90deg, var(--green), #66BB6A);
}

.feature-card__img {
  padding: 0;
  overflow: hidden;
}

.feature-card__img img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.feature-card__body {
  padding: 28px 24px;
}

.feature-card__title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--gray-900);
  margin-bottom: 12px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.feature-card__num {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: 0.05em;
}

.feature-card__text {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--gray-600);
}

/* ---------- CURRICULUM (Zigzag) ---------- */
.zigzag {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.zigzag__item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.zigzag__item--reverse {
  direction: rtl;
}

.zigzag__item--reverse > * {
  direction: ltr;
}

.zigzag__img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.zigzag__img img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.zigzag__body p {
  font-size: 1.05rem;
  line-height: 2;
  color: var(--gray-700);
}

.zigzag__body p + p {
  margin-top: 16px;
}

.curriculum__links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-top: 48px;
}

.curriculum__links .btn {
  width: 100%;
  max-width: 480px;
  justify-content: center;
  font-size: 0.9rem;
  padding: 14px 28px;
}

.btn--line {
  background: linear-gradient(135deg, #00b900 0%, #06C755 100%);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(6, 199, 85, 0.35);
}

.btn--line:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(6, 199, 85, 0.45);
}

.btn--line:active {
  transform: translateY(0);
}

.btn--youtube {
  background: linear-gradient(135deg, #c4302b 0%, #FF0000 100%);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(255, 0, 0, 0.3);
}

.btn--youtube:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 0, 0, 0.4);
}

.btn--youtube:active {
  transform: translateY(0);
}

.btn--orange {
  background: linear-gradient(135deg, var(--orange) 0%, var(--orange-light) 100%);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(244, 81, 30, 0.3);
}

.btn--orange:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(244, 81, 30, 0.4);
}

.btn--orange:active {
  transform: translateY(0);
}

.btn--pink {
  background: linear-gradient(135deg, #C2185B 0%, var(--pink) 100%);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(232, 30, 99, 0.3);
}

.btn--pink:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(232, 30, 99, 0.4);
}

.btn--pink:active {
  transform: translateY(0);
}

/* ---------- EVENTS ---------- */
.events__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.event-card {
  display: block;
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), box-shadow var(--transition);
  color: inherit;
}

.event-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.event-card__img img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.event-card__body {
  padding: 24px;
}

.event-card__title {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--gray-900);
  margin-bottom: 10px;
}

.event-card__text {
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--gray-600);
}

/* ---------- CTA BANNER ---------- */
.cta-banner {
  padding: 60px 0;
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 100%);
  text-align: center;
}

.cta-banner__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.cta-banner__text {
  font-size: 1.1rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
}

.cta-banner--final {
  background: linear-gradient(135deg, var(--gray-900) 0%, var(--blue-dark) 50%, var(--blue) 100%);
  padding: 80px 0;
}

.cta-banner__lead {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
}

/* ---------- Simple CTA Banner ---------- */
.cta-banner__inner--simple {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-simple__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.cta-simple__divider {
  width: 1px;
  height: 80px;
  background: rgba(255, 255, 255, 0.25);
  flex-shrink: 0;
}

/* ---------- Trial CTA ---------- */
.cta-banner--trial {
  padding: 80px 0;
}

.cta-banner__inner--trial {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0 40px;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

.trial-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
}

.trial-block__icon {
  color: rgba(255, 255, 255, 0.5);
}

.trial-block__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.6;
}

.trial-block__text {
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
}

.trial-block__note {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.02em;
}

.trial-divider {
  width: 1px;
  height: 220px;
  background: rgba(255, 255, 255, 0.2);
  align-self: center;
}

/* ---------- STATISTICS ---------- */
.stats__intro {
  text-align: center;
  font-size: 1.05rem;
  line-height: 2;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 60px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.stat-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: background var(--transition);
}

.stat-card:hover {
  background: rgba(255, 255, 255, 0.08);
}

.stat-card__number {
  margin-bottom: 16px;
}

.stat-card__value {
  font-family: var(--font-en);
  font-size: 4rem;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--yellow) 0%, var(--orange-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-card__unit {
  font-family: var(--font-en);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--yellow);
}

.stat-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}

.stat-card__desc {
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 16px;
}

.stat-card__cite {
  display: block;
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.5;
}

/* ---------- AI ERA ---------- */
.ai-era__blocks {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px;
  margin-bottom: 48px;
}

.ai-era__block {
  text-align: center;
}

.ai-era__img {
  margin-bottom: 20px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.ai-era__img img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.ai-era__heading {
  font-size: 1.15rem;
  font-weight: 900;
  line-height: 1.6;
  color: var(--gray-900);
}

/* ---------- Callout ---------- */
.callout {
  display: flex;
  gap: 20px;
  background: linear-gradient(135deg, var(--yellow-light) 0%, #FFF3E0 100%);
  border: 2px solid var(--yellow);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 800px;
  margin: 0 auto;
}

.callout__icon {
  font-size: 2rem;
  flex-shrink: 0;
  line-height: 1;
}

.callout__title {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.callout__text {
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--gray-700);
}

/* ---------- VISION ---------- */
/* Vision uses zigzag layout - no additional styles needed */

/* ---------- CURRICULUM CARD GRID ---------- */
.curriculum-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.curriculum-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), box-shadow var(--transition);
}

.curriculum-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.curriculum-card__img img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.curriculum-card__body {
  padding: 20px 20px 24px;
}

.curriculum-card__title {
  font-size: 0.95rem;
  font-weight: 900;
  color: var(--gray-900);
  margin-bottom: 8px;
  line-height: 1.5;
}

.curriculum-card__text {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--gray-600);
}

/* ---------- CLAFT RULE ---------- */
.claft-rule__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.claft-rule__img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.claft-rule__img img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.claft-rule__text {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.claft-rule__text p {
  font-size: 1.6rem;
  font-weight: 900;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.85);
}

.claft-rule__text strong {
  color: var(--yellow);
  -webkit-text-fill-color: var(--yellow);
}

.claft-rule__subtitle {
  font-size: 1rem !important;
  font-weight: 700 !important;
  letter-spacing: 0.12em;
  color: var(--yellow) !important;
  -webkit-text-fill-color: var(--yellow) !important;
  text-transform: none;
  opacity: 0.9;
}

.claft-rule__body {
  font-size: 0.95rem !important;
  font-weight: 400 !important;
  line-height: 1.9 !important;
  color: rgba(255, 255, 255, 0.75) !important;
}


/* ---------- FOOTER ---------- */
.footer {
  background: var(--gray-50);
  color: var(--gray-600);
  padding: 60px 0 32px;
  border-top: 1px solid var(--gray-200);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.footer__logo {
  height: 56px;
  width: auto;
  display: block;
}

.footer__name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
}

.footer__address {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--gray-600);
}

.footer__tel {
  color: var(--blue);
  font-weight: 700;
  transition: color var(--transition);
}

.footer__tel:hover {
  color: var(--orange);
}

.footer__url {
  font-size: 0.88rem;
  color: var(--blue);
  transition: color var(--transition);
}

.footer__url:hover {
  color: #42A5F5;
}

.footer__sns {
  display: flex;
  gap: 16px;
}

.footer__sns-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gray-200);
  color: var(--gray-700);
  transition: all var(--transition);
}

.footer__sns-link:hover {
  background: var(--gray-300);
  color: var(--gray-900);
  transform: translateY(-2px);
}

.footer__sns-link svg {
  width: 20px;
  height: 20px;
}

.footer__copy {
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-top: 16px;
}

/* ---------- Scroll Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive: Tablet ---------- */
@media (max-width: 1024px) {
  .features__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .events__grid {
    gap: 20px;
  }

  .stats__grid {
    gap: 20px;
  }

  .hero__title {
    font-size: 4rem;
  }

  .section__title {
    font-size: 1.75rem;
  }
}

/* ---------- Responsive: Mobile ---------- */
@media (max-width: 768px) {
  :root {
    --header-h: 60px;
  }

  .sp-only {
    display: inline;
  }

  .container {
    padding: 0 16px;
  }

  .section {
    padding: 64px 0;
  }

  .section__header {
    margin-bottom: 36px;
  }

  .section__title {
    font-size: 1.5rem;
  }

  .section__label {
    font-size: 0.72rem;
  }

  /* Header */
  .header__logo img {
    height: 34px;
  }

  .btn--sm {
    font-size: 0.78rem;
    padding: 8px 18px;
  }

  /* Hero */
  .hero__title {
    font-size: 3rem;
  }

  .hero__copy {
    font-size: 1.15rem;
  }

  .hero__school {
    font-size: 0.82rem;
  }

  .btn--lg {
    font-size: 0.95rem;
    padding: 14px 32px;
  }

  .btn--xl {
    font-size: 1.05rem;
    padding: 16px 40px;
  }

  .hero__deco--1 {
    width: 180px;
    height: 180px;
  }

  .hero__deco--2,
  .hero__deco--3 {
    display: none;
  }

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

  .feature-card__body {
    padding: 20px;
  }

  .feature-card__title {
    font-size: 1.2rem;
  }

  /* Curriculum */
  .zigzag__item {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .zigzag__item--reverse {
    direction: ltr;
  }

  .zigzag__body p {
    font-size: 0.95rem;
  }

  .curriculum__links {
    margin-top: 36px;
  }

  .curriculum__links .btn {
    font-size: 0.85rem;
    padding: 12px 20px;
    white-space: normal;
    text-align: center;
  }

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

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

  .stats__intro {
    font-size: 0.92rem;
    margin-bottom: 36px;
  }

  .stat-card {
    padding: 28px 24px;
  }

  .stat-card__value {
    font-size: 3rem;
  }

  .stat-card__unit {
    font-size: 1.4rem;
  }

  /* AI Era */
  .ai-era__blocks {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .ai-era__heading {
    font-size: 1.05rem;
  }

  /* Callout */
  .callout {
    flex-direction: column;
    gap: 12px;
    padding: 24px;
  }

  /* Vision */

  /* Curriculum Grid */
  .curriculum-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  /* Claft Rule */
  .claft-rule__inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .claft-rule__text p {
    font-size: 1.3rem;
  }


  /* CTA Banner */
  .cta-banner {
    padding: 48px 0;
  }

  .cta-banner--final {
    padding: 60px 0;
  }

  .cta-banner__text {
    font-size: 0.95rem;
  }

  .cta-banner__lead {
    font-size: 1.1rem;
  }

  /* Simple CTA */
  .cta-banner__inner--simple {
    flex-direction: column;
    gap: 32px;
  }

  .cta-simple__divider {
    width: 60px;
    height: 1px;
  }

  /* Trial CTA */
  .cta-banner--trial {
    padding: 60px 0;
  }

  .cta-banner__inner--trial {
    grid-template-columns: 1fr;
    gap: 40px 0;
  }

  .trial-divider {
    width: 80px;
    height: 1px;
  }

  .trial-block__title {
    font-size: 1rem;
  }

  /* Footer */
  .footer {
    padding: 48px 0 28px;
  }

  .footer__logo {
    height: 44px;
  }
}

/* ---------- Responsive: Small Mobile ---------- */
@media (max-width: 400px) {
  .hero__title {
    font-size: 2.4rem;
  }

  .section__title {
    font-size: 1.3rem;
  }

  .curriculum-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Prefer reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  html {
    scroll-behavior: auto;
  }
}