/* ============================================================
   LP-08: VITALIFT — Online Fitness LP
   CSS — Dark Theme x Yellow Accent
   ============================================================ */

/* ============================================
   CSS Variables
   ============================================ */
:root {
  --primary: #FBBF24;
  --primary-dark: #D69E2E;
  --primary-light: rgba(251, 191, 36, 0.15);
  --accent: #FBBF24;
  --bg: #0A0A0A;
  --bg-alt: #111111;
  --bg-card: rgba(255,255,255,0.04);
  --text: #FFFFFF;
  --text-muted: #9CA3AF;
  --border: rgba(255,255,255,0.1);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  --radius: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --text-hero: clamp(36px, 5vw, 56px);
  --text-h2: clamp(28px, 3.5vw, 40px);
  --text-h3: clamp(20px, 2.5vw, 24px);
  --text-body: 16px;
  --text-small: 14px;
  --text-caption: 12px;
  --space-section: clamp(80px, 10vw, 120px);
  --space-group: clamp(40px, 5vw, 64px);
  --space-element: clamp(16px, 2vw, 24px);
  --space-tight: 8px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Sora', 'Noto Sans JP', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  animation: fadeIn 0.5s ease-out;
  overflow-x: hidden;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

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

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* ============================================
   Utilities
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 80px);
}

.section {
  padding: var(--space-section) 0;
}

.pc-only { display: inline; }
.sp-only { display: none; }

/* Scroll animation */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.stagger-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.animate-on-scroll.visible .stagger-item,
.stagger-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll.visible .stagger-item:nth-child(1) { transition-delay: 0s; }
.animate-on-scroll.visible .stagger-item:nth-child(2) { transition-delay: 0.1s; }
.animate-on-scroll.visible .stagger-item:nth-child(3) { transition-delay: 0.15s; }
.animate-on-scroll.visible .stagger-item:nth-child(4) { transition-delay: 0.2s; }

/* Section header */
.section-header {
  text-align: center;
  margin-bottom: var(--space-group);
}

.section-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: var(--text-h2);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text);
}

.section-subtitle {
  font-size: var(--text-body);
  color: var(--text-muted);
  margin-top: 16px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}

/* ============================================
   Buttons
   ============================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--primary);
  color: #0A0A0A;
  font-size: 15px;
  font-weight: 700;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(251, 191, 36, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(251, 191, 36, 0.35);
  filter: brightness(1.05);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: var(--primary);
  font-size: 15px;
  font-weight: 600;
  border: 2px solid var(--primary);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: var(--primary);
  color: #0A0A0A;
  transform: translateY(-2px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 14px 24px;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s;
}

.btn-ghost:hover {
  color: var(--text);
}

.btn-large {
  padding: 16px 40px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
  text-align: center;
}

/* ============================================
   Header
   ============================================ */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: background-color 0.3s, box-shadow 0.3s, backdrop-filter 0.3s, padding 0.3s;
  padding: 16px 0;
}

header.scrolled {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 3px rgba(0,0,0,0.5);
  padding: 12px 0;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 80px);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 1001;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--text);
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--text);
}

.nav-cta {
  background: var(--primary);
  color: #0A0A0A !important;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 13px;
  transition: all 0.2s ease;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(251, 191, 36, 0.3);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  z-index: 1001;
  padding: 4px;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: all 0.3s ease;
  display: block;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Overlay */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 999;
}

.overlay.open {
  opacity: 1;
  pointer-events: auto;
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 360px;
  height: 100vh;
  height: 100dvh;
  background: #111111;
  z-index: 1000;
  transition: right 0.3s ease;
  display: flex;
  flex-direction: column;
  padding: 24px;
  overflow-y: auto;
}

.mobile-menu.open {
  right: 0;
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
}

.mobile-close {
  color: var(--text-muted);
  transition: color 0.2s;
}

.mobile-close:hover {
  color: var(--text);
}

.mobile-link {
  display: block;
  padding: 16px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  transition: color 0.2s;
}

.mobile-link:hover {
  color: var(--text);
}

.mobile-cta {
  margin-top: 24px;
  background: var(--primary);
  color: #0A0A0A !important;
  border-radius: var(--radius);
  text-align: center;
  font-weight: 700;
  border-bottom: none;
}

/* ============================================
   Hero
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(251, 191, 36, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(251, 191, 36, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-content {
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 1;
}

.hero-text {
  flex: 1;
  min-width: 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  border: 1px solid rgba(251, 191, 36, 0.2);
}

.hero-title {
  font-size: var(--text-hero);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.accent-text {
  color: var(--primary);
}

.hero-desc {
  font-size: var(--text-body);
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero-stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.hero-stat-label {
  font-size: var(--text-caption);
  color: var(--text-muted);
}

/* Hero visual — device mockup */
.hero-visual {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

.device-mockup {
  position: relative;
  width: 100%;
  max-width: 400px;
}

.device-screen {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.device-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.device-overlay {
  position: absolute;
  top: 16px;
  left: 16px;
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(239, 68, 68, 0.9);
  color: #fff;
  padding: 6px 12px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.live-dot {
  width: 8px;
  height: 8px;
  background: #fff;
  border-radius: 50%;
  animation: livePulse 1.5s ease infinite;
}

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

.device-frame {
  position: absolute;
  inset: -3px;
  border: 3px solid rgba(255,255,255,0.1);
  border-radius: calc(var(--radius-lg) + 3px);
  pointer-events: none;
}

/* Floating cards */
.floating-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(8px);
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  animation: floatCard 4s ease-in-out infinite;
}

.floating-card-1 {
  top: 10%;
  right: -20px;
  animation-delay: 0s;
}

.floating-card-2 {
  bottom: 15%;
  left: -30px;
  animation-delay: 2s;
}

@keyframes floatCard {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.fc-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
}

.fc-value {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}

/* Scroll indicator */
.hero-scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ============================================
   Programs
   ============================================ */
.programs {
  background: var(--bg-alt);
}

.program-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.program-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}

.program-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.15);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}

.program-image {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.program-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.program-card:hover .program-image img {
  transform: scale(1.05);
}

.program-level {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
}

.program-body {
  padding: 20px;
}

.program-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 8px;
}

.program-name {
  font-size: var(--text-h3);
  font-weight: 700;
  margin-bottom: 8px;
}

.program-desc {
  font-size: var(--text-small);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.program-meta {
  display: flex;
  gap: 16px;
}

.program-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-caption);
  color: var(--text-muted);
}

/* ============================================
   Trainers
   ============================================ */
.trainers {
  background: var(--bg);
}

.trainer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.trainer-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}

.trainer-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.15);
  box-shadow: var(--shadow-lg);
}

.trainer-photo {
  aspect-ratio: 1;
  overflow: hidden;
}

.trainer-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.trainer-card:hover .trainer-photo img {
  transform: scale(1.05);
}

.trainer-info {
  padding: 24px;
}

.trainer-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.trainer-role {
  font-size: var(--text-small);
  color: var(--primary);
  font-weight: 600;
  display: block;
  margin-bottom: 12px;
}

.trainer-bio {
  font-size: var(--text-small);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.trainer-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.trainer-tags span {
  background: rgba(255,255,255,0.06);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 500;
}

/* ============================================
   Reviews
   ============================================ */
.reviews {
  background: var(--bg-alt);
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s ease;
}

.review-card:hover {
  border-color: rgba(255,255,255,0.15);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
}

.review-name {
  font-size: 15px;
  font-weight: 700;
}

.review-meta {
  font-size: var(--text-caption);
  color: var(--text-muted);
  display: block;
  margin-top: 2px;
}

.review-stars {
  display: flex;
  gap: 2px;
  margin-bottom: 12px;
}

.review-text {
  font-size: var(--text-small);
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.review-result {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--primary-light);
  border-radius: var(--radius);
  border: 1px solid rgba(251, 191, 36, 0.15);
}

.result-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
  padding: 2px 8px;
  background: rgba(251, 191, 36, 0.2);
  border-radius: 4px;
  flex-shrink: 0;
}

.result-value {
  font-size: var(--text-small);
  font-weight: 600;
  color: var(--text);
}

/* ============================================
   Pricing
   ============================================ */
.pricing {
  background: var(--bg);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  max-width: 800px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px;
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card:hover {
  border-color: rgba(255,255,255,0.15);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.pricing-card-featured {
  border-color: var(--primary);
  background: rgba(251, 191, 36, 0.05);
}

.pricing-card-featured:hover {
  border-color: var(--primary);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #0A0A0A;
  padding: 4px 16px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
}

.pricing-header {
  margin-bottom: 24px;
}

.pricing-name {
  font-size: var(--text-h3);
  font-weight: 700;
  margin-bottom: 4px;
}

.pricing-desc {
  font-size: var(--text-small);
  color: var(--text-muted);
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 8px;
}

.price-currency {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-muted);
}

.price-amount {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
}

.price-period {
  font-size: var(--text-small);
  color: var(--text-muted);
}

.pricing-save {
  font-size: var(--text-caption);
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 24px;
}

.pricing-features {
  margin-bottom: 28px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--text-small);
  color: var(--text-muted);
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-note {
  text-align: center;
  font-size: var(--text-small);
  color: var(--text-muted);
  margin-top: var(--space-group);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   App Section
   ============================================ */
.app-section {
  background: var(--bg-alt);
}

.app-content {
  display: flex;
  align-items: center;
  gap: 80px;
}

.app-text {
  flex: 1;
}

.app-desc {
  font-size: var(--text-body);
  color: var(--text-muted);
  line-height: 1.8;
  margin-top: 20px;
  margin-bottom: 32px;
}

.app-platforms {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.platform-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

.platform-item:hover {
  border-color: rgba(255,255,255,0.2);
}

.platform-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  border-radius: var(--radius);
  color: var(--primary);
  flex-shrink: 0;
}

.platform-name {
  font-size: 15px;
  font-weight: 600;
  display: block;
}

.platform-detail {
  font-size: var(--text-caption);
  color: var(--text-muted);
  display: block;
  margin-top: 2px;
}

/* App phone mockup */
.app-visual {
  flex: 0 0 280px;
  display: flex;
  justify-content: center;
}

.app-phone {
  width: 260px;
  background: #1A1A1A;
  border-radius: 36px;
  padding: 12px;
  border: 2px solid rgba(255,255,255,0.1);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  position: relative;
}

.phone-notch {
  width: 120px;
  height: 24px;
  background: #0A0A0A;
  border-radius: 0 0 16px 16px;
  margin: 0 auto 12px;
}

.phone-screen {
  background: #0A0A0A;
  border-radius: 24px;
  padding: 20px 16px;
  min-height: 380px;
}

.app-ui-header {
  margin-bottom: 24px;
}

.app-ui-greeting {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
}

.app-ui-name {
  display: block;
  font-size: 18px;
  font-weight: 700;
  margin-top: 2px;
}

.app-ui-today {
  margin-bottom: 20px;
}

.app-ui-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.app-ui-lesson {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.app-ui-lesson-img {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #FBBF24, #F59E0B);
  border-radius: 8px;
  flex-shrink: 0;
}

.app-ui-lesson-name {
  display: block;
  font-size: 13px;
  font-weight: 600;
}

.app-ui-lesson-time {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
}

.app-ui-live-badge {
  background: #EF4444;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  margin-left: auto;
  flex-shrink: 0;
}

.app-ui-stats {
  display: flex;
  gap: 12px;
}

.app-ui-stat {
  flex: 1;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius);
  padding: 12px;
  text-align: center;
}

.app-ui-stat-num {
  display: block;
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
}

.app-ui-stat-label {
  display: block;
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ============================================
   Signup Section
   ============================================ */
.signup-section {
  background: var(--bg);
}

.signup-wrapper {
  display: flex;
  gap: 60px;
  align-items: center;
}

.signup-info {
  flex: 1;
}

.signup-desc {
  font-size: var(--text-body);
  color: var(--text-muted);
  line-height: 1.8;
  margin-top: 20px;
  margin-bottom: 28px;
}

.signup-benefits {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.signup-benefits li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--text-small);
  color: var(--text-muted);
}

/* Signup form */
.signup-form-wrapper {
  flex: 0 0 440px;
}

.signup-form {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px;
}

.form-title {
  font-size: var(--text-h3);
  font-weight: 700;
  margin-bottom: 24px;
  text-align: center;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: var(--text-small);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.required {
  color: #EF4444;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  background: rgba(255,255,255,0.05);
  border: 1.5px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  color: var(--text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  font-family: inherit;
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.15);
}

.form-input::placeholder {
  color: #6B7280;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%239CA3AF' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.form-select option {
  background: #1A1A1A;
  color: #fff;
}

.btn-submit {
  margin-top: 4px;
}

.form-note {
  text-align: center;
  font-size: var(--text-caption);
  color: var(--text-muted);
  margin-top: 16px;
}

/* ============================================
   FAQ Section
   ============================================ */
.faq-section {
  background: var(--bg-alt);
}

.faq-list {
  max-width: 740px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  font-size: var(--text-body);
  font-weight: 600;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition: color 0.2s;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--text-muted);
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding-bottom: 20px;
}

.faq-answer p {
  font-size: var(--text-small);
  color: var(--text-muted);
  line-height: 1.8;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: #050505;
  padding: 64px 0 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}

.footer-logo {
  font-size: 22px;
  margin-bottom: 12px;
  display: block;
}

.footer-tagline {
  font-size: var(--text-small);
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.7;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  color: var(--text-muted);
  transition: all 0.2s;
}

.footer-social a:hover {
  background: var(--primary);
  color: #0A0A0A;
}

.footer-heading {
  font-size: var(--text-small);
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

.footer-link {
  display: block;
  font-size: var(--text-small);
  color: var(--text-muted);
  padding: 4px 0;
  transition: color 0.2s;
}

.footer-link:hover {
  color: var(--primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  font-size: var(--text-caption);
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  gap: 20px;
}

.footer-legal a {
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer-legal a:hover {
  color: var(--text);
}

/* ============================================
   Back to Top
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #0A0A0A;
  border: none;
  box-shadow: 0 4px 12px rgba(251, 191, 36, 0.3);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.show {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(251, 191, 36, 0.4);
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }

  .stagger-item {
    opacity: 1;
    transform: none;
  }
}

/* ============================================
   Responsive — Tablet (1024px)
   ============================================ */
@media (max-width: 1024px) {
  .hero-content {
    flex-direction: column;
    text-align: center;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    min-height: 300px;
    max-width: 480px;
    margin: 0 auto;
  }

  .floating-card-1 {
    right: 0;
  }

  .floating-card-2 {
    left: 0;
  }

  .program-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .trainer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .trainer-grid .trainer-card:last-child {
    grid-column: 1 / -1;
    max-width: 50%;
    margin: 0 auto;
  }

  .review-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .review-grid .review-card:last-child {
    grid-column: 1 / -1;
    max-width: 60%;
    margin: 0 auto;
  }

  .app-content {
    flex-direction: column;
    text-align: center;
    gap: 48px;
  }

  .app-platforms {
    max-width: 400px;
    margin: 0 auto;
  }

  .signup-wrapper {
    flex-direction: column;
    text-align: center;
  }

  .signup-info {
    max-width: 560px;
  }

  .signup-benefits {
    align-items: center;
  }

  .signup-form-wrapper {
    flex: none;
    width: 100%;
    max-width: 480px;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

/* ============================================
   Responsive — Mobile (768px)
   ============================================ */
@media (max-width: 768px) {
  .pc-only { display: none; }
  .sp-only { display: inline; }

  .desktop-nav { display: none; }
  .hamburger { display: flex; }

  .hero {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .hero-title {
    font-size: clamp(28px, 7vw, 40px);
  }

  .hero-visual {
    max-width: 320px;
  }

  .floating-card {
    display: none;
  }

  .hero-scroll-indicator {
    display: none;
  }

  .hero-stats {
    gap: 24px;
  }

  .hero-stat-num {
    font-size: 22px;
  }

  .program-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .trainer-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .trainer-grid .trainer-card:last-child {
    grid-column: auto;
    max-width: none;
  }

  .trainer-card {
    display: flex;
    gap: 0;
  }

  .trainer-photo {
    flex: 0 0 120px;
    aspect-ratio: auto;
  }

  .review-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .review-grid .review-card:last-child {
    grid-column: auto;
    max-width: none;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .pricing-card {
    padding: 28px;
  }

  .price-amount {
    font-size: 40px;
  }

  .app-visual {
    flex: none;
  }

  .app-phone {
    width: 220px;
    padding: 10px;
    border-radius: 28px;
  }

  .phone-screen {
    min-height: 320px;
    padding: 16px 12px;
  }

  .signup-wrapper {
    gap: 40px;
  }

  .signup-form {
    padding: 24px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .footer-legal {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }
}

/* ============================================
   Responsive — Small Mobile (375px)
   ============================================ */
@media (max-width: 400px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn-primary {
    width: 100%;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
    align-items: center;
  }

  .hero-stat {
    flex-direction: row;
    gap: 8px;
    align-items: baseline;
  }

  .signup-form-wrapper {
    max-width: none;
  }
}