/* =============================================
   ChatJapanese – Professional Landing Page CSS
   ============================================= */

/* ---- Design Tokens ---- */
:root {
  --color-primary:       #0099CC;
  --color-primary-dark:  #0077AA;
  --color-primary-light: #00BBFF;
  --color-secondary:     #FF9900;
  --color-bg:            #FFFAF6;
  --color-bg-alt:        #FFF5EE;
  --color-surface:       #FFFFFF;
  --color-text:          #1A1A1A;
  --color-text-muted:    #6B6B6B;
  --color-border:        #E8E0D8;
  --color-white:         #FFFFFF;

  --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;

  --radius-sm:  8px;
  --radius-md:  16px;
  --radius-lg:  24px;
  --radius-xl:  32px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:  0 4px 16px rgba(0,0,0,.10), 0 2px 6px rgba(0,0,0,.06);
  --shadow-lg:  0 12px 40px rgba(0,0,0,.12), 0 4px 12px rgba(0,0,0,.08);
  --shadow-xl:  0 24px 64px rgba(0,0,0,.14);

  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

  --container-max: 1200px;
  --container-pad: clamp(1rem, 4vw, 2rem);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

ul { list-style: none; }

/* ---- Layout Utilities ---- */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: rgba(0, 153, 204, 0.1);
  padding: 0.35em 1em;
  border-radius: 100px;
  margin-bottom: 1rem;
}

.tag-white {
  color: var(--color-white);
  background: rgba(255,255,255,0.2);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn-lg {
  padding: 0.9rem 2.25rem;
  font-size: 1rem;
}

.btn-full { width: 100%; justify-content: center; }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 153, 204, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.btn-outline-primary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline-primary:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 153, 204, 0.3);
}

.btn-white {
  background: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}
.btn-white:hover {
  background: var(--color-white);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.btn-white-solid {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}
.btn-white-solid:hover {
  background: var(--color-bg-alt);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.btn-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* =============================================
   NAVBAR
   ============================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: all var(--transition);
  background: #FFFFFF;
  box-shadow: var(--shadow-sm);
}

.navbar.scrolled {
  background: #FFFFFF;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md);
  padding: 0.75rem 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.logo {
  font-family: var(--font-sans);
  font-size: 1.375rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.logo-chat    { color: var(--color-text); }
.logo-japanese { color: var(--color-primary); }

.logo-img {
  display: block;
  width: auto;
  max-height: 40px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background: rgba(232, 98, 42, 0.08);
}

.nav-cta { margin-left: 1rem; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  margin-left: auto;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-surface);
  z-index: 999;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu ul {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 2rem;
}

.mobile-link {
  display: block;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  padding: 0.875rem 2rem;
  border-radius: var(--radius-md);
  width: 100%;
  text-align: center;
  transition: all var(--transition);
}

.mobile-link:hover { background: var(--color-bg-alt); color: var(--color-primary); }

.mobile-cta {
  background: var(--color-primary);
  color: var(--color-white) !important;
  margin-top: 1rem;
}

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
  background-color: var(--color-bg-alt);
  padding: 8rem 0 5rem;
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,153,204,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(0, 153, 204, 0.1);
  padding: 0.5rem 1rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(0, 153, 204, 0.2);
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(1.2); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 4.5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: 1.5rem;
}

.hero-title .highlight {
  color: var(--color-primary);
  display: block;
}

.hero-subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 2rem;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.stat { text-align: center; }

.stat-number {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-top: 0.25rem;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}

.hero-image-wrap {
  position: relative;
}

.hero-image-frame {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  aspect-ratio: 1 / 1;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.hero-image-frame:hover .hero-img {
  transform: scale(1.03);
}

.hero-float-card {
  position: absolute;
  bottom: -1.5rem;
  left: -2rem;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.float-icon { font-size: 2rem; }

.float-title {
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--color-text);
}

.float-sub {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* =============================================
   FEATURE SECTION
   ============================================= */
.feature-section {
  position: relative;
  padding: 7rem 0;
  overflow: hidden;
  color: var(--color-white);
}

.feature-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.feature-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(10, 10, 20, 0.82) 0%,
    rgba(30, 20, 10, 0.65) 60%,
    rgba(10, 10, 20, 0.50) 100%
  );
}

.feature-inner {
  position: relative;
  z-index: 1;
  max-width: 640px;
}

.feature-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--color-white);
}

.feature-title em {
  font-style: italic;
  color: #FFB07A;
}

.feature-desc {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.85);
  margin-bottom: 2.5rem;
}

/* =============================================
   WHY CHOOSE US
   ============================================= */
.why-section {
  padding: 6rem 0;
  background: var(--color-surface);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.why-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.why-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  opacity: 0;
  transition: opacity var(--transition);
}

.why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 153, 204, 0.2);
}

.why-card:hover::before { opacity: 1; }

.why-number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 800;
  color: rgba(0, 153, 204, 0.15);
  line-height: 1;
  margin-bottom: 1.25rem;
  transition: color var(--transition);
}

.why-card:hover .why-number {
  color: rgba(0, 153, 204, 0.3);
}

.why-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.875rem;
  line-height: 1.35;
}

.why-card-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

/* =============================================
   PROMO SECTION
   ============================================= */
.promo-section {
  background: var(--color-bg-alt);
  padding: 6rem 0;
}

.promo-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.promo-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  color: var(--color-secondary);
  line-height: 1.2;
  margin-bottom: 1.25rem;
}

.promo-date {
  font-size: 0.75em;
  color: var(--color-text-muted);
  display: block;
  font-family: var(--font-sans);
  font-weight: 600;
  margin-top: 0.25rem;
}

.promo-desc {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 2rem;
}

.promo-image-wrap {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: visible;
}

.promo-img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.promo-badge {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(10, 10, 10, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: 1.5rem 2rem;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.15);
}

.promo-old-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: rgba(255,255,255,0.5);
  text-decoration: line-through;
}

.promo-slash {
  width: 60px;
  height: 2px;
  background: rgba(255,255,255,0.3);
  margin: 0.5rem auto;
}

.promo-new-price {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-secondary);
}

/* =============================================
   COURSES SECTION
   ============================================= */
.courses-section {
  padding: 6rem 0;
  background: var(--color-surface);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.course-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
  position: relative;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

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

.course-card-featured {
  border-color: var(--color-secondary);
  transform: scale(1.04);
  z-index: 2;
  box-shadow: var(--shadow-xl);
  display: none;
}

.course-card-featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.course-badge-popular {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--color-white);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3em 0.85em;
  border-radius: 100px;
  letter-spacing: 0.05em;
  z-index: 2;
}

.course-header {
  padding: 2rem 2rem 1.5rem;
  text-align: center;
}

.course-header-default {
  background: #F5F0EB;
}

.course-header-featured {
  background: var(--color-primary);
  color: var(--color-white);
}

.course-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  display: block;
}

.course-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.375rem;
  color: inherit;
}

.course-tagline {
  font-size: 0.875rem;
  opacity: 0.75;
  color: inherit;
}

.course-header-featured .course-name,
.course-header-featured .course-tagline {
  color: var(--color-white);
}

.course-body {
  padding: 2rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.course-price {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--color-border);
}

.price-amount {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1;
}

.price-currency {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-muted);
}

.price-period {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-left: 0.125rem;
}

.course-features {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  margin-bottom: 2rem;
}

.course-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.check-icon {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 0.1rem;
}

/* =============================================
   ACTIVITY SECTION
   ============================================= */
.activity-section {
  padding: 6rem 0;
  background: var(--color-bg);
}

.activity-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: 380px;
  gap: 1.5rem;
  align-items: stretch;
}

@media (max-width: 1024px) {
  .activity-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: 320px;
  }
}

@media (max-width: 768px) {
  .activity-grid {
    grid-template-columns: 1fr;
    grid-template-rows: 300px;
  }
}

.activity-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  cursor: pointer;
}

.activity-card-large {
  grid-row: span 1;
}

.activity-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.activity-card:hover .activity-img {
  transform: scale(1.06);
}

.activity-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.5rem;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
  color: var(--color-white);
  transition: all var(--transition);
}

.activity-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.25em 0.75em;
  border-radius: 100px;
  margin-bottom: 0.5rem;
}

.activity-name {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.375rem;
}

.activity-desc {
  font-size: 0.875rem;
  opacity: 0.85;
  line-height: 1.5;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.activity-card:hover .activity-desc {
  max-height: 80px;
}

/* =============================================
   ENROLLMENT SECTION
   ============================================= */
.enrollment-section {
  padding: 6rem 0;
  background: var(--color-surface);
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 0;
  align-items: start;
}

.step-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  transition: all var(--transition);
}

.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 153, 204, 0.3);
}

.step-card-final .step-title-final {
  color: var(--color-primary);
}

.step-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: rgba(0, 153, 204, 0.2);
  line-height: 1;
  margin-bottom: 1rem;
}

.step-icon-wrap {
  margin-bottom: 1rem;
  display: flex;
  justify-content: center;
}

.step-icon {
  width: 48px;
  height: 48px;
}

.step-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.step-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.step-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 0.5rem;
  margin-top: 5rem;
  opacity: 0.6;
}

.step-connector svg {
  width: 40px;
  height: 12px;
}

/* =============================================
   FAQ SECTION
   ============================================= */
.faq-section {
  padding: 6rem 0;
  background: var(--color-bg-alt);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  max-width: 900px;
  margin-inline: auto;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item[open] {
  border-color: rgba(0, 153, 204, 0.3);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition);
}

.faq-question::-webkit-details-marker { display: none; }

.faq-item[open] .faq-question {
  color: var(--color-primary);
}

.faq-arrow {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform var(--transition);
  color: var(--color-text-muted);
}

.faq-item[open] .faq-arrow {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.faq-answer {
  padding: 0 1.5rem 1.25rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: var(--color-text);
  color: var(--color-white);
  padding-top: 4rem;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo .logo-chat    { color: var(--color-white); }
.footer-logo .logo-japanese { color: var(--color-primary-light); }

.footer-tagline {
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  margin-top: 1rem;
  max-width: 320px;
}

.footer-nav-title {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 1.25rem;
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  list-style: none;
  padding: 0;
}

.footer-nav a,
.footer-contact a {
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.7);
  transition: color var(--transition);
}

.footer-nav a:hover,
.footer-contact a:hover {
  color: var(--color-white);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-contact p {
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.7);
}

.footer-bottom {
  padding: 1.5rem 0;
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copy {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.4);
}

.footer-legal {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.4);
}

.footer-legal a {
  color: rgba(255,255,255,0.4);
  transition: color var(--transition);
}

.footer-legal a:hover { color: rgba(255,255,255,0.7); }

/* =============================================
   SCROLL ANIMATIONS
   ============================================= */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

[data-animate-delay="1"] { transition-delay: 0.1s; }
[data-animate-delay="2"] { transition-delay: 0.2s; }
[data-animate-delay="3"] { transition-delay: 0.3s; }

/* =============================================
   RESPONSIVE DESIGN
   ============================================= */
@media (max-width: 1024px) {
  .hero-inner    { grid-template-columns: 1fr; gap: 3rem; }
  .hero          { padding: 7rem 0 4rem; }
  .hero-content  { max-width: 600px; margin-inline: auto; text-align: center; }
  .hero-subtitle { max-width: 100%; }
  .hero-actions  { justify-content: center; }
  .hero-stats    { justify-content: center; }
  .hero-image-wrap { max-width: 480px; margin-inline: auto; }
  .hero-float-card { left: 0; bottom: -1rem; }

  .why-grid      { grid-template-columns: 1fr 1fr; }
  .courses-grid  { grid-template-columns: 1fr; max-width: 480px; margin-inline: auto; }
  .course-card-featured { transform: none; }
  .course-card-featured:hover { transform: translateY(-6px); }

  .promo-inner   { grid-template-columns: 1fr; gap: 3rem; }
  .promo-content { text-align: center; }

  .activity-grid { grid-template-columns: 1fr 1fr; grid-template-rows: 280px 280px; }

  .steps-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto;
    gap: 1.5rem;
  }
  .step-connector { display: none; }

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

  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .mobile-menu { display: flex; }

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

  .activity-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }
  .activity-card { height: 260px; }

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

  .footer-inner { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }

  .footer-bottom-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .hero-stats { flex-wrap: wrap; justify-content: center; gap: 1rem; }
  .stat-divider { display: none; }
  .promo-badge { padding: 1rem 1.25rem; }
  .promo-new-price { font-size: 1.5rem; }
}