/* YourFitnessPal — marketing site
 * Theme mirrors the Flutter app (see App/lib/core/theme):
 *   bg #000, surface #1A1A1A, surfaceLight #242424,
 *   text #FFF / #9E9E9E / #6B6B6B, border #2A2A2A / #333,
 *   success #30D158, error #FF453A, warning #FFD60A,
 *   Inter font, pill buttons, radius scale 8/12/16/20/28/pill.
 */

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

:root {
  --bg: #000000;
  --surface: #1A1A1A;
  --surface-light: #242424;
  --surface-elev: #2E2E2E;

  --text-primary: #FFFFFF;
  --text-secondary: #9E9E9E;
  --text-tertiary: #6B6B6B;

  --border: #2A2A2A;
  --border-light: #333333;

  --success: #30D158;
  --error: #FF453A;
  --warning: #FFD60A;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 28px;
  --radius-pill: 999px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  --container: 1200px;
  --container-narrow: 880px;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a { color: var(--text-primary); text-decoration: none; transition: opacity .15s ease; }
a:hover { opacity: .8; }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--space-6); }
.container-narrow { width: 100%; max-width: var(--container-narrow); margin: 0 auto; padding: 0 var(--space-6); }
.section { padding: var(--space-24) 0; }
.section-sm { padding: var(--space-16) 0; }

/* ---------- Typography ---------- */
.h-display { font-size: clamp(40px, 6vw, 72px); font-weight: 800; line-height: 1.05; letter-spacing: -0.03em; margin: 0; }
.h-1       { font-size: clamp(32px, 4vw, 48px);  font-weight: 800; line-height: 1.1;  letter-spacing: -0.02em; margin: 0; }
.h-2       { font-size: clamp(24px, 3vw, 36px);  font-weight: 700; line-height: 1.15; letter-spacing: -0.015em; margin: 0; }
.h-3       { font-size: 20px; font-weight: 600; line-height: 1.3; margin: 0; }
.h-4       { font-size: 18px; font-weight: 600; line-height: 1.3; margin: 0; }

.lead { font-size: clamp(18px, 2vw, 22px); color: var(--text-secondary); line-height: 1.5; max-width: 720px; }

.muted   { color: var(--text-secondary); }
.dim     { color: var(--text-tertiary); }
.success { color: var(--success); }
.error   { color: var(--error); }
.warning { color: var(--warning); }

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-5);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 52px;
  padding: 0 28px;
  font-family: var(--font);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: transform .12s ease, background .15s ease, color .15s ease, border-color .15s ease, opacity .15s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn:active { transform: scale(.98); }

.btn-primary {
  background: #FFFFFF;
  color: #000000;
}
.btn-primary:hover { background: #EDEDED; opacity: 1; }

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-light);
}
.btn-secondary:hover { background: var(--surface); opacity: 1; }

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: transparent;
  padding: 0 16px;
}
.btn-ghost:hover { color: var(--text-secondary); opacity: 1; }

.btn-sm { height: 40px; padding: 0 18px; font-size: 14px; }
.btn-lg { height: 60px; padding: 0 36px; font-size: 16px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(0,0,0,0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: 17px;
}
.brand-mark {
  width: 28px; height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, #FFFFFF 0%, #BFBFBF 100%);
  color: #000;
  display: grid; place-items: center;
  font-weight: 800; font-size: 14px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text-primary); opacity: 1; }
.nav-links a.active { color: var(--text-primary); }

.nav-cta { display: flex; align-items: center; gap: 12px; }

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  width: 40px; height: 40px;
  padding: 0;
  color: var(--text-primary);
  cursor: pointer;
}

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-cta .btn-secondary { display: none; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav.open .nav-links {
    display: flex;
    position: absolute;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    background: rgba(0,0,0,0.92);
    padding: var(--space-5) var(--space-6) var(--space-6);
    border-bottom: 1px solid var(--border);
    gap: var(--space-4);
  }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: var(--space-20) 0 var(--space-16);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px; left: 50%;
  transform: translateX(-50%);
  width: 900px; height: 900px;
  background: radial-gradient(closest-side, rgba(255,255,255,0.08), transparent 70%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-12);
  align-items: center;
}
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--space-10); }
}
.hero-cta { display: flex; gap: 12px; margin-top: var(--space-6); flex-wrap: wrap; }
.hero-trust {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-top: var(--space-8);
  color: var(--text-tertiary);
  font-size: 13px;
}
.hero-trust .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--text-tertiary); }

/* Phone mockup (CSS-only) */
.phone {
  position: relative;
  width: 320px;
  height: 660px;
  margin: 0 auto;
  border-radius: 48px;
  background: linear-gradient(180deg, #1a1a1a, #0a0a0a);
  padding: 14px;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.06),
    0 40px 80px rgba(0,0,0,0.6),
    inset 0 1px 0 rgba(255,255,255,0.05);
}
.phone::before {
  content: '';
  position: absolute;
  top: 22px; left: 50%; transform: translateX(-50%);
  width: 110px; height: 28px;
  background: #000;
  border-radius: 14px;
  z-index: 2;
}
.phone-screen {
  width: 100%; height: 100%;
  background: #000;
  border-radius: 36px;
  overflow: hidden;
  position: relative;
  padding: 56px 18px 18px;
}
.phone-status { display: flex; justify-content: space-between; font-size: 11px; color: var(--text-secondary); margin-bottom: 14px; padding: 0 6px; }
.phone-hello { font-size: 13px; color: var(--text-secondary); }
.phone-title { font-size: 22px; font-weight: 800; margin: 2px 0 14px; letter-spacing: -0.02em; }
.phone-ring {
  width: 180px; height: 180px; margin: 0 auto 14px;
  position: relative;
  border-radius: 50%;
  background:
    conic-gradient(#FFFFFF 0 62%, #2A2A2A 62% 100%);
  display: grid; place-items: center;
}
.phone-ring::before {
  content: '';
  position: absolute;
  inset: 14px;
  background: #000;
  border-radius: 50%;
}
.phone-ring-inner { position: relative; text-align: center; }
.phone-ring-inner .kcal { font-size: 30px; font-weight: 800; letter-spacing: -0.02em; }
.phone-ring-inner .label { font-size: 11px; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: .14em; }
.phone-macros { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 10px; }
.phone-macro { background: var(--surface); border-radius: 12px; padding: 10px; text-align: center; border: 1px solid var(--border); }
.phone-macro .v { font-weight: 700; font-size: 14px; }
.phone-macro .l { font-size: 10px; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: .12em; }
.phone-row { display:flex; gap:8px; margin-top:10px; }
.phone-pill { flex:1; background: var(--surface); border:1px solid var(--border); border-radius: 12px; padding: 10px 12px; font-size: 12px; color: var(--text-secondary); display: flex; align-items: center; gap: 8px; }
.phone-pill .ic { width: 18px; height: 18px; border-radius: 50%; background: var(--surface-light); display:inline-block; }

/* ---------- Stats / Social proof ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: var(--space-10) 0;
}
@media (max-width: 720px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
}
.stat-num { font-size: clamp(28px, 4vw, 40px); font-weight: 800; letter-spacing: -0.02em; }
.stat-label { color: var(--text-secondary); font-size: 13px; margin-top: 4px; }

/* ---------- Feature grid ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
@media (max-width: 880px) { .feature-grid { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.card:hover { border-color: var(--border-light); }
.card-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  background: var(--surface-light);
  display: grid; place-items: center;
  font-size: 20px;
  margin-bottom: var(--space-4);
}
.card h3 { margin-bottom: 8px; }
.card p { color: var(--text-secondary); margin: 0; font-size: 15px; }

/* ---------- Numbered step row ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  counter-reset: step;
}
@media (max-width: 880px) { .steps { grid-template-columns: 1fr; } }
.step { padding: var(--space-6); border: 1px solid var(--border); border-radius: var(--radius-xl); background: var(--surface); }
.step-num {
  display: inline-grid; place-items: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--surface-light);
  font-weight: 700; font-size: 14px;
  margin-bottom: var(--space-4);
  border: 1px solid var(--border-light);
}

/* ---------- Two-column feature blocks ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}
@media (max-width: 880px) { .split { grid-template-columns: 1fr; gap: var(--space-8); } }
.split.reverse { direction: rtl; }
.split.reverse > * { direction: ltr; }
.split-visual {
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  background: linear-gradient(180deg, var(--surface), var(--bg));
  padding: var(--space-6);
  min-height: 360px;
  display: grid;
  place-items: center;
}

/* ---------- Testimonials ---------- */
.quotes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
@media (max-width: 880px) { .quotes { grid-template-columns: 1fr; } }
.quote {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}
.quote .stars { color: var(--warning); letter-spacing: 2px; margin-bottom: 12px; }
.quote p { margin: 0 0 var(--space-4); font-size: 15px; }
.quote-author { display: flex; align-items: center; gap: 10px; color: var(--text-secondary); font-size: 13px; }
.avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4a4a4a, #1a1a1a);
  display: grid; place-items: center;
  font-weight: 700; font-size: 12px;
  color: #fff;
}

/* ---------- Pricing ---------- */
.tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
@media (max-width: 880px) { .tiers { grid-template-columns: 1fr; } }
.tier {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
}
.tier.featured {
  background: linear-gradient(180deg, #1c1c1c, #0e0e0e);
  border-color: var(--border-light);
  position: relative;
}
.tier-tag {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: #fff; color: #000;
  font-size: 11px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase;
  padding: 6px 12px; border-radius: var(--radius-pill);
}
.tier h3 { font-size: 18px; margin-bottom: 4px; }
.tier-price { font-size: 44px; font-weight: 800; letter-spacing: -0.02em; margin: var(--space-4) 0 4px; }
.tier-price small { font-size: 14px; font-weight: 500; color: var(--text-secondary); }
.tier-billing { color: var(--text-tertiary); font-size: 13px; margin-bottom: var(--space-6); }
.tier ul { list-style: none; padding: 0; margin: 0 0 var(--space-6); display: grid; gap: 10px; }
.tier li { display: flex; align-items: flex-start; gap: 10px; color: var(--text-secondary); font-size: 14px; }
.tier li::before { content: '✓'; color: var(--success); font-weight: 800; margin-top: 1px; }
.tier li.off { color: var(--text-tertiary); text-decoration: line-through; }
.tier li.off::before { content: '×'; color: var(--text-tertiary); }
.tier .btn { margin-top: auto; }

/* ---------- Comparison table ---------- */
.matrix {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-6);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.matrix th, .matrix td {
  padding: 14px 16px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}
.matrix th { background: var(--surface-light); font-weight: 600; }
.matrix td.center, .matrix th.center { text-align: center; }
.matrix tr:last-child td { border-bottom: 0; }
.matrix .yes { color: var(--success); font-weight: 700; }
.matrix .no { color: var(--text-tertiary); }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 12px; }
.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
}
.faq summary {
  list-style: none;
  cursor: pointer;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; color: var(--text-secondary); font-size: 22px; line-height: 1; transition: transform .2s; }
.faq details[open] summary::after { content: '−'; }
.faq details > p { color: var(--text-secondary); margin: var(--space-4) 0 0; font-size: 15px; }

/* ---------- Integrations ---------- */
.logos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-4);
}
.logo-chip {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  height: 64px;
  display: grid;
  place-items: center;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.01em;
}

/* ---------- Blog ---------- */
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
@media (max-width: 880px) { .post-grid { grid-template-columns: 1fr; } }
.post {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.post-thumb {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #2a2a2a, #0a0a0a);
  display: grid; place-items: center;
  color: var(--text-tertiary);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 12px;
}
.post-body { padding: var(--space-5) var(--space-6) var(--space-6); }
.post-cat { color: var(--text-tertiary); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 8px; }
.post h3 { margin-bottom: 8px; font-size: 17px; }
.post p { color: var(--text-secondary); font-size: 14px; margin: 0; }
.post-meta { color: var(--text-tertiary); font-size: 12px; margin-top: var(--space-4); }

.featured-post {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-8);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  margin-bottom: var(--space-10);
}
@media (max-width: 880px) { .featured-post { grid-template-columns: 1fr; } }
.featured-post .post-thumb { aspect-ratio: 16 / 10; }
.featured-post .post-body { padding: var(--space-8); display: flex; flex-direction: column; justify-content: center; }
.featured-post h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 800; margin: 0 0 var(--space-3); letter-spacing: -0.02em; }
.featured-post p { color: var(--text-secondary); font-size: 16px; }

/* ---------- Contact form ---------- */
.form {
  display: grid;
  gap: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
}
.form label { font-size: 13px; color: var(--text-secondary); margin-bottom: 6px; display: block; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 720px) { .form .row { grid-template-columns: 1fr; } }
.form input, .form select, .form textarea {
  width: 100%;
  background: var(--bg);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-family: var(--font);
  font-size: 15px;
  outline: none;
  transition: border-color .15s ease;
}
.form input:focus, .form select:focus, .form textarea:focus { border-color: var(--border-light); }
.form textarea { min-height: 140px; resize: vertical; }

/* ---------- CTA banner ---------- */
.cta-banner {
  background: linear-gradient(180deg, #161616, #050505);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-12);
  text-align: center;
}
.cta-banner h2 { margin: 0 0 var(--space-3); }
.cta-banner p { color: var(--text-secondary); max-width: 600px; margin: 0 auto var(--space-6); }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: var(--space-16) 0 var(--space-8);
  color: var(--text-secondary);
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer h4 { color: var(--text-primary); margin: 0 0 var(--space-4); font-size: 13px; letter-spacing: .12em; text-transform: uppercase; }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer a { color: var(--text-secondary); }
.footer a:hover { color: var(--text-primary); opacity: 1; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
  color: var(--text-tertiary);
  font-size: 13px;
}

/* ---------- Legal pages ---------- */
.legal h1 { margin-bottom: var(--space-3); }
.legal .updated { color: var(--text-tertiary); font-size: 13px; margin-bottom: var(--space-8); }
.legal h2 { margin: var(--space-10) 0 var(--space-3); font-size: 22px; }
.legal h3 { margin: var(--space-6) 0 var(--space-2); font-size: 17px; }
.legal p, .legal li { color: var(--text-secondary); }
.legal ul { padding-left: 20px; display: grid; gap: 6px; }

/* ---------- Helpers ---------- */
.text-center { text-align: center; }
.section-head { text-align: center; margin-bottom: var(--space-10); }
.section-head h2 { margin-bottom: var(--space-3); }
.section-head p { color: var(--text-secondary); max-width: 640px; margin: 0 auto; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.mt-8 { margin-top: var(--space-8); }
.mb-8 { margin-bottom: var(--space-8); }