/* ============================================================
   OverLog — Design System
   Dark-first, green brand, iOS-inspired
   ============================================================ */

:root {
  --bg:            #0B1110;
  --surface:       #151F1B;
  --surface-alt:   #1C2924;
  --text:          #F0F5F2;
  --text-secondary:#C4D1CA;
  --muted:         #7A8E85;
  --green:         #4ADE80;
  --green-soft:    rgba(74, 222, 128, 0.12);
  --green-strong:  #22C55E;
  --green-glow:    rgba(74, 222, 128, 0.25);
  --border:        #243530;
  --border-subtle: #1C2924;
  --shadow:        0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg:     0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-green:  0 4px 24px rgba(74, 222, 128, 0.15);
  --radius:        14px;
  --radius-lg:     24px;
  --radius-xl:     36px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:            #F5F8F6;
    --surface:       #FFFFFF;
    --surface-alt:   #EFF3F1;
    --text:          #1A1F1C;
    --text-secondary:#4A5550;
    --muted:         #6B7D74;
    --green:         #16A34A;
    --green-soft:    rgba(22, 163, 74, 0.08);
    --green-strong:  #15803D;
    --green-glow:    rgba(22, 163, 74, 0.12);
    --border:        #D4DDD8;
    --border-subtle: #E8EDEA;
    --shadow:        0 1px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg:     0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-green:  0 4px 24px rgba(22, 163, 74, 0.1);
  }
}

/* ---- Reset ---- */

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ---- Layout ---- */

.container {
  width: min(1200px, 90vw);
  margin: 0 auto;
}

.section {
  padding: 100px 0;
}

.section + .section {
  border-top: 1px solid var(--border-subtle);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--green);
  background: var(--green-soft);
  border-radius: 100px;
  border: 1px solid rgba(74, 222, 128, 0.15);
}

.section-title {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.section-subtitle {
  margin: 0 0 48px;
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 560px;
  line-height: 1.6;
}

.section-center {
  text-align: center;
}

.section-center .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ---- Header ---- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(11, 17, 16, 0.85);
  border-bottom: 1px solid var(--border-subtle);
}

@media (prefers-color-scheme: light) {
  .site-header {
    background: rgba(245, 248, 246, 0.85);
  }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand {
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green-glow);
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 6px 14px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}

.nav a:hover {
  color: var(--text);
  background: var(--surface);
}

.nav a.active {
  color: var(--green);
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-decoration: none;
  border-radius: 12px;
  padding: 14px 28px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  color: #0B1110;
  background: var(--green);
  box-shadow: var(--shadow-green);
}

.btn-primary:hover {
  background: var(--green-strong);
  transform: translateY(-1px);
  box-shadow: 0 6px 28px rgba(74, 222, 128, 0.25);
}

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

.btn-secondary:hover {
  background: var(--surface-alt);
  border-color: var(--green);
}

.btn-appstore {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  background: var(--text);
  color: var(--bg);
  padding: 12px 24px;
  border-radius: 12px;
  transition: opacity 0.2s, transform 0.2s;
}

.btn-appstore:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-appstore-icon {
  width: 24px;
  height: 24px;
}

.btn-appstore-text {
  display: flex;
  flex-direction: column;
  text-align: left;
  line-height: 1.2;
}

.btn-appstore-label {
  font-size: 0.65rem;
  font-weight: 400;
  opacity: 0.8;
}

.btn-appstore-store {
  font-size: 1.1rem;
  font-weight: 600;
}

/* ---- Hero ---- */

.hero {
  padding: 80px 0 60px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  max-width: 560px;
}

.hero-title {
  margin: 0 0 20px;
  font-size: clamp(2.75rem, 5.5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.hero-title .green {
  color: var(--green);
}

.hero-description {
  margin: 0 0 36px;
  color: var(--text-secondary);
  font-size: 1.15rem;
  line-height: 1.65;
  max-width: 480px;
}

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

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

/* ---- Phone Mockup ---- */

.phone {
  position: relative;
  width: 280px;
  background: #1A1A1E;
  border-radius: 44px;
  padding: 14px;
  border: 2px solid #333;
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.05) inset;
}

.phone::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 28px;
  background: #1A1A1E;
  border-radius: 0 0 18px 18px;
  z-index: 2;
}

.phone-screen {
  border-radius: 30px;
  overflow: hidden;
  background: #000;
  aspect-ratio: 9 / 19.5;
}

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

.phone-glow {
  position: absolute;
  width: 200%;
  height: 200%;
  top: -50%;
  left: -50%;
  background: radial-gradient(circle at center, var(--green-glow) 0%, transparent 60%);
  z-index: -1;
  opacity: 0.4;
  animation: glow-pulse 4s ease-in-out infinite;
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.05); }
}

.phone-float {
  animation: float 6s ease-in-out infinite;
}

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

/* ---- Watch Mockup ---- */

.watch {
  position: relative;
  width: 180px;
  background: #1A1A1E;
  border-radius: 42px;
  padding: 12px;
  border: 2px solid #333;
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.4),
    0 0 0 1px rgba(255, 255, 255, 0.05) inset;
}

.watch::before,
.watch::after {
  content: "";
  position: absolute;
  right: -8px;
  width: 6px;
  background: #333;
  border-radius: 0 3px 3px 0;
}

.watch::before {
  top: 40%;
  height: 30px;
}

.watch::after {
  top: 55%;
  height: 14px;
}

.watch-screen {
  border-radius: 30px;
  overflow: hidden;
  background: #000;
  aspect-ratio: 5 / 6;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.watch-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  height: 100%;
  padding: 16px;
  border: 2px dashed var(--border);
  border-radius: 28px;
  color: var(--muted);
  font-size: 0.7rem;
  text-align: center;
}

.watch-placeholder-icon {
  font-size: 1.5rem;
  opacity: 0.5;
}

/* ---- Feature Grid ---- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid var(--border-subtle);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  border-color: var(--border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--green-soft);
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  font-size: 1.25rem;
  color: var(--green);
}

.feature-card h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 600;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

/* ---- Screenshots ---- */

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

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

.screen-item .phone {
  width: 100%;
  max-width: 260px;
  margin: 0 auto 24px;
}

.screen-item h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  font-weight: 600;
}

.screen-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

/* ---- Watch Section ---- */

.watch-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.watch-features {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.watch-features li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.watch-feature-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--green-soft);
  display: grid;
  place-items: center;
  font-size: 1rem;
  color: var(--green);
}

.watch-visual {
  display: flex;
  justify-content: center;
  position: relative;
}

/* ---- Programs Section ---- */

.programs-showcase {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}

.program-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: 100px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: border-color 0.2s, background 0.2s;
}

.program-pill:hover {
  border-color: var(--green);
  background: var(--green-soft);
  color: var(--text);
}

.program-pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  opacity: 0.6;
}

.programs-stats {
  display: flex;
  gap: 48px;
  margin-top: 40px;
}

.programs-stat {
  display: flex;
  flex-direction: column;
}

.programs-stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--green);
  letter-spacing: -0.02em;
}

.programs-stat-label {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 2px;
}

/* ---- Pricing ---- */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  border: 1px solid var(--border-subtle);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--green);
  box-shadow: var(--shadow-green);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 32px;
  padding: 4px 14px;
  background: var(--green);
  color: #0B1110;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 100px;
  letter-spacing: 0.03em;
}

.pricing-tier {
  margin: 0 0 4px;
  font-size: 1.3rem;
  font-weight: 700;
}

.pricing-price {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 0.9rem;
}

.pricing-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pricing-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.pricing-check {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--green-soft);
  color: var(--green);
  display: grid;
  place-items: center;
  font-size: 0.7rem;
  font-weight: 700;
}

/* ---- CTA Band ---- */

.cta-band {
  text-align: center;
  padding: 80px 40px;
  background:
    radial-gradient(ellipse at 50% 0%, var(--green-glow) 0%, transparent 60%),
    var(--surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-subtle);
  margin: 0 auto;
  max-width: 1000px;
}

.cta-band .section-title {
  margin-bottom: 12px;
}

.cta-band .section-subtitle {
  margin-bottom: 36px;
}

/* ---- Footer ---- */

.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 40px 0 56px;
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand .brand {
  font-size: 1rem;
}

.footer-copy {
  color: var(--muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s;
}

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

/* ---- Doc Pages (Privacy, Terms) ---- */

.doc {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 800px;
  margin: 0 auto;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-subtle);
}

.doc h1 {
  margin-top: 0;
  font-weight: 700;
  font-size: 1.75rem;
}

.doc h2, .doc h3 {
  margin-top: 2em;
  font-weight: 600;
}

.doc p, .doc li {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}

.doc a {
  color: var(--green);
  text-decoration: none;
}

.doc a:hover {
  text-decoration: underline;
}

.doc ul, .doc ol {
  padding-left: 24px;
}

/* ---- Responsive ---- */

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-description {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

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

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

  .screens-row {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .screen-item .phone {
    max-width: 240px;
  }

  .watch-grid {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }

  .watch-features li {
    justify-content: center;
    text-align: left;
  }

  .programs-stats {
    gap: 32px;
    justify-content: center;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 64px 0;
  }

  .hero {
    padding: 48px 0 40px;
  }

  .header-inner {
    flex-direction: column;
    gap: 12px;
    padding: 12px 0;
  }

  .nav {
    gap: 4px;
  }

  .nav a {
    padding: 6px 10px;
    font-size: 0.85rem;
  }

  .phone {
    border-radius: 36px;
    padding: 10px;
  }

  .phone::before {
    top: 10px;
    width: 80px;
    height: 22px;
    border-radius: 0 0 14px 14px;
  }

  .phone-screen {
    border-radius: 26px;
  }

  .cta-band {
    padding: 48px 24px;
    border-radius: var(--radius-lg);
  }

  .doc {
    padding: 24px;
    border-radius: var(--radius);
  }

  .programs-stats {
    flex-wrap: wrap;
    gap: 24px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
}