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

/* Light theme (default) */
:root {
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  --text-tertiary: #777777;
  --text-muted: #7a7a7a;
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  --btn-text: #FFFFFF;
  --phone-screen: #f5f5f7;
}

/* Dark theme */
[data-theme="dark"] {
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  --text: #FFFFFF;
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}

/* Typography */
html {
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}

body {
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body.no-watermark::before {
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}

.content {
  max-width: 1200px;
  margin: 0 auto;
}

h1, h2, h3 {
  text-wrap: balance;
}

p {
  text-wrap: pretty;
  max-width: 65ch;
}

/* Nav */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1rem 1.5rem;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

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

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text);
}

.logo svg {
  height: 32px;
  width: auto;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-cta {
  padding: 0.5rem 1.25rem;
  background: var(--btn-bg);
  color: var(--btn-text);
  border: none;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.nav-cta:hover {
  opacity: 0.85;
  transform: scale(1.03);
}

/* Theme toggle */
.theme-toggle {
  position: relative;
  width: 44px;
  height: 26px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 100px;
  cursor: pointer;
  transition: background 0.3s, border-color 0.3s;
  flex-shrink: 0;
}

.theme-toggle input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-track {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5px;
}

.toggle-icon {
  width: 14px;
  height: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.toggle-icon svg {
  width: 12px;
  height: 12px;
  stroke: var(--text-tertiary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: var(--btn-bg);
  border-radius: 50%;
  transition: transform 0.3s;
}

[data-theme="dark"] .toggle-thumb {
  transform: translateX(18px);
}

/* Hero */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.5rem;
  min-height: 100vh;
}

.hero h1 {
  font-size: clamp(1.5rem, 1.2rem + 0.8vw, 2rem); /* 24px → 32px */
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin-bottom: 1rem;
  max-width: 700px;
  color: var(--text);
}

.app-icon {
  width: 120px;
  height: 120px;
  border-radius: 26.8px; /* 22.37% of 120px — matches iOS icon radius */
  margin-bottom: 3rem;
  box-shadow:
    0 0 1px rgba(0, 0, 0, 0.05),
    0 1px 1px rgba(0, 0, 0, 0.05),
    0 2px 2px rgba(0, 0, 0, 0.05),
    0 4px 4px rgba(0, 0, 0, 0.05),
    0 8px 8px rgba(0, 0, 0, 0.05);
}

.tagline {
  font-size: clamp(1rem, 0.9rem + 0.5vw, 1.25rem); /* 16px → 20px */
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.hero p {
  font-size: clamp(0.9375rem, 0.875rem + 0.2vw, 1.0625rem); /* 15px → 17px */
  color: var(--text-secondary);
  max-width: 52ch;
  line-height: 1.65;
  margin-bottom: 2.5rem;
}

/* App Store buttons */
.download-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 2rem;
}

.app-store-btn {
  display: inline-block;
  text-decoration: none;
  transition: transform 0.2s, opacity 0.2s;
}

a.app-store-btn:hover {
  transform: scale(1.03);
  opacity: 0.9;
}

.app-store-btn img {
  display: block;
  height: 54px;
  width: auto;
}

.app-store-btn .badge-dark {
  display: none;
}

[data-theme="dark"] .app-store-btn .badge-light {
  display: none;
}

[data-theme="dark"] .app-store-btn .badge-dark {
  display: block;
}

.mac-app-store-btn {
  position: relative;
  cursor: not-allowed;
  pointer-events: none;
}

.mac-app-store-btn img {
  opacity: 0.4;
}

.coming-soon {
  position: absolute;
  top: -8px;
  right: -8px;
  background: #FF3B30;
  color: #FFFFFF;
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.5rem;
  border-radius: 8px;
  text-transform: uppercase;
  white-space: nowrap;
  transform: rotate(15deg);
  transform-origin: center;
  box-shadow:
    0 1px 1px rgba(0, 0, 0, 0.08),
    0 2px 2px rgba(0, 0, 0, 0.07),
    0 4px 6px rgba(0, 0, 0, 0.06),
    0 8px 12px rgba(0, 0, 0, 0.05),
    0 16px 24px rgba(0, 0, 0, 0.04);
}

/* iPhone frame */
.iphone-frame {
  position: relative;
  width: 100%;
  max-width: 280px;
  aspect-ratio: 1470 / 3000;
  margin: 3rem auto 0;
}

.iphone-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  pointer-events: none;
  user-select: none;
  filter:
    drop-shadow(0 1px 1px rgba(0, 0, 0, 0.08))
    drop-shadow(0 4px 6px rgba(0, 0, 0, 0.07))
    drop-shadow(0 12px 16px rgba(0, 0, 0, 0.06))
    drop-shadow(0 24px 32px rgba(0, 0, 0, 0.05));
}

.iphone-screen {
  position: absolute;
  top: 2.2%;
  left: 5.3%;
  right: 5.3%;
  bottom: 2.2%;
  background: var(--phone-screen);
  border-radius: 10.5% / 5.2%;
  overflow: hidden;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.iphone-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Features */
.features {
  padding: 0 1.5rem 6rem;
  max-width: 960px;
  margin: 0 auto;
}

.features-header {
  text-align: center;
  margin-bottom: 3rem;
}

.features-header h2 {
  font-size: clamp(1.75rem, 1.4rem + 1.5vw, 3rem); /* 28px → 48px */
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.features-header p {
  color: var(--text-tertiary);
  font-size: clamp(0.9375rem, 0.875rem + 0.2vw, 1.0625rem); /* 15px → 17px */
  max-width: 45ch;
  margin: 0 auto;
  line-height: 1.65;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--border);
  border-radius: 20px;
  overflow: hidden;
}

.feature-card {
  padding: 2rem 1.5rem;
  background: var(--bg);
}

.feature-icon {
  width: 40px;
  height: 40px;
  background: var(--surface);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.125rem;
}

.feature-card h3 {
  font-size: 1.0625rem; /* 17px — card title, fixed */
  font-weight: 600;
  margin-bottom: 0.375rem;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.feature-card p {
  font-size: 0.9375rem; /* 15px — card body, fixed */
  color: var(--text-tertiary);
  line-height: 1.6;
}

/* CTA */
.cta {
  text-align: center;
  padding: 0 1.5rem 6rem;
}

.cta h2 {
  font-size: clamp(1.75rem, 1.3rem + 2vw, 3.5rem); /* 28px → 56px */
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.cta p {
  color: var(--text-tertiary);
  font-size: clamp(0.9375rem, 0.875rem + 0.2vw, 1.0625rem); /* 15px → 17px */
  line-height: 1.65;
  margin: 0 auto 2rem;
}

/* Legal pages */
body.no-watermark main {
  padding: 0 1.5rem;
}

.legal {
  padding: 7rem 0 4rem;
}

.legal h1 {
  font-size: clamp(1.75rem, 1.4rem + 1.5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

.legal-updated {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
}

.legal h2 {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.legal p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.legal a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity 0.2s;
}

.legal a:hover {
  opacity: 0.7;
}

.legal-back {
  margin-top: 3rem;
  font-size: 0.9375rem;
}

.legal-back a {
  text-decoration: none;
}

/* Footer */
footer {
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

footer p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

footer a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

.footer-right {
  display: flex;
  gap: 1.5rem;
}

.footer-right a {
  font-size: 0.8125rem;
}

/* Tablet (640px+) */
@media (min-width: 640px) {
  nav {
    padding: 1.25rem 2rem;
  }

  .nav-right {
    gap: 1rem;
  }

  .hero {
    padding: 7rem 2rem;
  }

  .iphone-frame {
    max-width: 300px;
    margin-top: 3.5rem;
  }

  .features {
    padding: 0 2rem 7rem;
  }

  footer {
    padding: 2rem;
  }

  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }

  body.no-watermark main {
    padding: 0 2rem;
  }

  .legal {
    padding: 7rem 0 4rem;
  }

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

  .feature-card {
    padding: 2.25rem 2rem;
  }

  .cta {
    padding: 0 2rem 7rem;
  }

}

/* Desktop (960px+) */
@media (min-width: 960px) {
  .hero {
    padding: 8rem 2rem;
  }

  .hero p {
    margin-bottom: 3rem;
  }

  .iphone-frame {
    max-width: 320px;
    margin-top: 4rem;
  }

  .features {
    padding: 0 2rem 8rem;
  }

  .features-header {
    margin-bottom: 4rem;
  }

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

  .feature-card {
    padding: 2.5rem 2rem;
  }

  .cta {
    padding: 0 2rem 8rem;
  }

  .cta p {
    margin-bottom: 2.5rem;
  }
}