/* ==========================================================================
   FITNESS TREND — DESIGN SYSTEM & STYLES (GOLD / BLACK / WHITE)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Outfit:wght@500;600;700;800&display=swap');

:root {
  --bg-main: #121214;
  --bg-surface: #1c1c1f;
  --bg-surface-elevated: #27272a;
  --bg-card: rgba(28, 28, 31, 0.85);
  --bg-card-border: rgba(255, 255, 255, 0.08);
  --bg-card-hover: rgba(39, 39, 42, 0.95);
  
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  
  --accent-primary: #edb314;
  --accent-secondary: #f59e0b;
  --accent-glow: rgba(237, 179, 20, 0.2);
  --accent-gradient: linear-gradient(135deg, #edb314 0%, #fcd34d 100%);
  --accent-green: #34d399;
  --accent-amber: #edb314;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 35px rgba(237, 179, 20, 0.3);
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', 'Inter', -apple-system, sans-serif;
  
  --container-width: 1160px;
  --header-height: 72px;
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-main: #fafafa;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f5f5f5;
  --bg-card: rgba(255, 255, 255, 0.95);
  --bg-card-border: rgba(0, 0, 0, 0.08);
  --bg-card-hover: #ffffff;
  
  --text-primary: #171717;
  --text-secondary: #737373;
  --text-muted: #a3a3a3;
  
  --accent-primary: #d97706;
  --accent-secondary: #b45309;
  --accent-glow: rgba(217, 119, 6, 0.15);
  --accent-gradient: linear-gradient(135deg, #edb314 0%, #d97706 100%);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 25px rgba(237, 179, 20, 0.2);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Background Atmosphere */
.bg-mesh {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 15% 15%, rgba(237, 179, 20, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 85% 65%, rgba(245, 158, 11, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 50% 90%, rgba(237, 179, 20, 0.04) 0%, transparent 40%);
  pointer-events: none;
  z-index: -1;
}

/* Header & Nav */
.header {
  position: sticky;
  top: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(18, 18, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--bg-card-border);
  z-index: 100;
  display: flex;
  align-items: center;
}

[data-theme="light"] .header {
  background: rgba(250, 250, 250, 0.9);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.logo-img {
  width: 32px !important;
  height: 32px !important;
  min-width: 32px !important;
  max-width: 32px !important;
  border-radius: 8px;
  object-fit: cover;
  display: block;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--accent-gradient);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #000000;
  box-shadow: 0 4px 12px var(--accent-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
}

.btn-primary {
  background: #ffffff;
  color: #000000;
  font-weight: 700;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 255, 255, 0.2);
}

[data-theme="light"] .btn-primary {
  background: #171717;
  color: #ffffff;
}

[data-theme="light"] .btn-primary:hover {
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--bg-card-border);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: rgba(237, 179, 20, 0.3);
  transform: translateY(-2px);
}

.btn-glow {
  background: var(--accent-gradient);
  color: #000000;
  font-weight: 700;
  box-shadow: var(--shadow-glow);
}

.btn-glow:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 45px rgba(237, 179, 20, 0.45);
}

/* Theme Toggle */
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  border: 1px solid var(--bg-card-border);
  background: var(--bg-surface);
  transition: all 0.2s;
}

.theme-toggle:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(237, 179, 20, 0.1);
  border: 1px solid rgba(237, 179, 20, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 4.25rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
}

.hero-gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 36px;
  font-weight: 400;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

/* App Mockup Card */
.mockup-wrapper {
  max-width: 760px;
  margin: 0 auto;
  position: relative;
}

.mockup-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
}

.stats-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 1px solid var(--bg-card-border);
  margin-bottom: 20px;
}

.stat-item {
  text-align: center;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.stat-val {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
}

.stat-unit {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Feature Grid */
.section {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(237, 179, 20, 0.25);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(237, 179, 20, 0.08);
  border: 1px solid rgba(237, 179, 20, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Legal / Text Page Layout */
.legal-container {
  max-width: 800px;
  margin: 40px auto 80px;
  padding: 0 24px;
}

.legal-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--bg-card-border);
}

.legal-header h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.legal-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.legal-content {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.legal-content h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 36px 0 14px;
}

.legal-content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 24px 0 8px;
}

.legal-content p {
  margin-bottom: 16px;
}

.legal-content ul, .legal-content ol {
  margin: 12px 0 20px 24px;
}

.legal-content li {
  margin-bottom: 8px;
}

.legal-box {
  background: var(--bg-surface);
  border: 1px solid var(--bg-card-border);
  border-left: 4px solid var(--accent-primary);
  padding: 20px;
  border-radius: var(--radius-sm);
  margin: 24px 0;
}

.legal-box h4 {
  color: var(--text-primary);
  margin-bottom: 6px;
}

/* FAQ Section */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.faq-icon {
  transition: transform 0.2s ease;
}

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

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  display: none;
}

.faq-item.open .faq-answer {
  display: block;
}

/* Footer */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--bg-card-border);
  background: var(--bg-surface);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 320px;
}

.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--bg-card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 16px;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .stats-bar {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .footer-brand {
    grid-column: 1 / -1;
  }
}