/* ═══════════════════════════════════════════════════════════════
   PULSE — Landing Page Styles
   Premium black & white fitness brand aesthetic
   ═══════════════════════════════════════════════════════════════ */

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

:root {
  --bg: #000000;
  --bg-card: #0a0a0a;
  --bg-elevated: #111111;
  --bg-glass: rgba(255,255,255,0.04);
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.15);
  --text-primary: #ffffff;
  --text-secondary: rgba(255,255,255,0.65);
  --text-muted: rgba(255,255,255,0.4);
  --accent: #ffffff;
  --accent-subtle: rgba(255,255,255,0.1);
  --gradient-start: #1a1a1a;
  --gradient-end: #000000;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;
  --shadow: 0 0 60px rgba(255,255,255,0.03);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

/* ─── Utility ──────────────────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 120px 0;
  position: relative;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: var(--accent-subtle);
  border: 1px solid var(--border);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.section-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
}

.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* ─── Animations ───────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes pulse-ring {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.05); opacity: 0.3; }
  100% { transform: scale(0.9); opacity: 0.7; }
}

@keyframes gradient-shift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.animate-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ─── Navigation ───────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}

.nav.scrolled {
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.nav-logo-icon {
  width: 36px;
  height: 36px;
  background: #fff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #000;
  font-weight: 900;
  font-size: 18px;
}

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

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.nav-links a:hover { color: var(--text-primary); }

.nav-cta {
  padding: 10px 24px;
  background: #fff;
  color: #000 !important;
  border-radius: var(--radius-pill);
  font-weight: 700 !important;
  font-size: 13px !important;
  transition: transform var(--transition), box-shadow var(--transition);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(255,255,255,0.2);
}

.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-mobile-toggle span {
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

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

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

.hero-bg::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
  animation: pulse-ring 6s ease-in-out infinite;
}

.hero-bg::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to top, var(--bg), transparent);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  background: var(--accent-subtle);
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 32px;
  animation: fadeInUp 0.8s ease forwards;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ade80;
  animation: pulse-ring 2s ease-in-out infinite;
}

.hero-title {
  font-size: clamp(48px, 8vw, 88px);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -4px;
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease 0.1s forwards;
  opacity: 0;
}

.hero-title .highlight {
  background: linear-gradient(135deg, #ffffff 0%, #888888 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 4s ease infinite;
}

.hero-description {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto 40px;
  animation: fadeInUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  animation: fadeInUp 0.8s ease 0.3s forwards;
  opacity: 0;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  background: #fff;
  color: #000;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255,255,255,0.2);
}

.btn-primary svg {
  width: 18px;
  height: 18px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  background: transparent;
  color: #fff;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  border-color: var(--border-hover);
  background: var(--accent-subtle);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 64px;
  animation: fadeInUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

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

.hero-stat-value {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -1px;
}

.hero-stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ─── Features ─────────────────────────────────────────────── */
.features { background: var(--bg); }

.features-header {
  text-align: center;
  margin-bottom: 72px;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  background: var(--accent-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 24px;
}

.feature-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.feature-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ─── How It Works ─────────────────────────────────────────── */
.how-it-works {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-card) 50%, var(--bg) 100%);
}

.how-it-works-header {
  text-align: center;
  margin-bottom: 80px;
}

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

.steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 16.5%;
  right: 16.5%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 28px;
  font-size: 28px;
  font-weight: 900;
  color: var(--text-primary);
  position: relative;
  z-index: 2;
  transition: var(--transition);
}

.step:hover .step-number {
  border-color: var(--border-hover);
  background: var(--accent-subtle);
}

.step-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.step-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 280px;
  margin: 0 auto;
}

/* ─── Showcase / App Preview ───────────────────────────────── */
.showcase {
  background: var(--bg);
  overflow: hidden;
}

.showcase-header {
  text-align: center;
  margin-bottom: 72px;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}

.showcase-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}

.showcase-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

.showcase-emoji {
  font-size: 48px;
  margin-bottom: 20px;
  display: block;
}

.showcase-item-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.showcase-item-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ─── Testimonial / Social Proof ───────────────────────────── */
.social-proof {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-card) 50%, var(--bg) 100%);
}

.social-proof-header {
  text-align: center;
  margin-bottom: 64px;
}

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

.proof-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px;
  transition: var(--transition);
}

.proof-card:hover {
  border-color: var(--border-hover);
}

.proof-stars {
  font-size: 14px;
  letter-spacing: 2px;
  color: #fbbf24;
  margin-bottom: 16px;
}

.proof-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.proof-author {
  font-size: 14px;
  font-weight: 600;
}

.proof-role {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ─── CTA Section ──────────────────────────────────────────── */
.cta-section {
  background: var(--bg);
  text-align: center;
}

.cta-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 32px;
  padding: 80px 48px;
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.03) 0%, transparent 70%);
}

.cta-title {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  letter-spacing: -2px;
  margin-bottom: 16px;
  position: relative;
}

.cta-desc {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  position: relative;
}

.cta-actions {
  position: relative;
  display: flex;
  justify-content: center;
  gap: 16px;
}

/* ─── Footer ───────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
  background: var(--bg);
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
}

.footer-brand-icon {
  width: 28px;
  height: 28px;
  background: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #000;
  font-weight: 900;
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

.footer-copy {
  font-size: 12px;
  color: var(--text-muted);
}

/* ─── Legal Pages ──────────────────────────────────────────── */
.legal-page {
  min-height: 100vh;
  padding: 120px 0 80px;
}

.legal-content {
  max-width: 720px;
  margin: 0 auto;
}

.legal-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 40px;
  transition: color var(--transition);
}

.legal-back:hover { color: var(--text-primary); }

.legal-title {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -1.5px;
  margin-bottom: 8px;
}

.legal-updated {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 48px;
}

.legal-section {
  margin-bottom: 36px;
}

.legal-section h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.legal-section h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 16px 0 8px;
}

.legal-section p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 12px;
}

.legal-section ul {
  list-style: none;
  padding: 0;
  margin-bottom: 12px;
}

.legal-section li {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  padding-left: 20px;
  position: relative;
  margin-bottom: 6px;
}

.legal-section li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--text-muted);
}

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 968px) {
  .features-grid,
  .steps,
  .proof-cards,
  .showcase-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps::before { display: none; }

  .hero-stats {
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .section { padding: 80px 0; }

  .nav-links { display: none; }
  .nav-mobile-toggle { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.95);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
  }

  .hero { padding: 100px 0 60px; }

  .hero-title { letter-spacing: -2px; }

  .hero-actions {
    flex-direction: column;
    width: 100%;
    padding: 0 20px;
  }

  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }

  .features-grid,
  .steps,
  .proof-cards,
  .showcase-grid {
    grid-template-columns: 1fr;
  }

  .cta-card {
    padding: 48px 24px;
    border-radius: 24px;
  }

  .cta-actions {
    flex-direction: column;
    padding: 0 20px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .legal-title {
    font-size: 28px;
  }
}