/* ── Custom Properties ── */
:root {
  --accent: #FF7A5D;
  --accent-hover: #e8654a;
  --bg: #FFF;
  --bg-alt: #F5F5F7;
  --text: #1D1D1F;
  --text-secondary: #6E6E73;
  --card-bg: #FFF;
  --card-border: rgb(0 0 0 / 0.08);
  --card-shadow: 0 1px 3px rgb(0 0 0 / 0.06);
  --nav-bg: rgb(255 255 255 / 0.82);
  --badge-text: #FFF;
  --badge-fg: #000;
  --footer-bg: #F5F5F7;
  --footer-border: rgb(0 0 0 / 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #FF8C71;
    --accent-hover: #ff9f88;
    --bg: #000;
    --bg-alt: #1C1C1E;
    --text: #F5F5F7;
    --text-secondary: #98989D;
    --card-bg: #1C1C1E;
    --card-border: rgb(255 255 255 / 0.08);
    --card-shadow: 0 1px 3px rgb(0 0 0 / 0.3);
    --nav-bg: rgb(0 0 0 / 0.82);
    --badge-text: #FFF;
    --badge-fg: #FFF;
    --footer-bg: #1C1C1E;
    --footer-border: rgb(255 255 255 / 0.06);
  }
}

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

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ── Skip Link ── */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #1D1D1F;
  color: #FFF;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 200;
  border-radius: 0 0 4px;
}

.skip-link:focus {
  top: 0;
  color: #FFF;
}

/* ── Container ── */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--card-border);
}

.nav-inner {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
}

.nav-brand:hover {
  color: var(--text);
}

.nav-icon {
  border-radius: 8px;
  width: 32px;
  height: 32px;
}

.nav-title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav-cta {
  color: var(--badge-fg);
  display: flex;
  align-items: center;
}

.app-store-badge-small {
  display: block;
}

/* ── Hero ── */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  background: var(--bg);
}

.hero-icon {
  width: 160px;
  height: 160px;
  border-radius: 36px;
  margin: 0 auto 32px;
  box-shadow: 0 8px 32px rgb(0 0 0 / 0.12);
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.app-store-link {
  display: inline-flex;
  color: var(--badge-fg);
}

.app-store-link:hover {
  opacity: 0.85;
  color: var(--badge-fg);
}

.app-store-badge {
  display: block;
}

/* ── Screenshots ── */
.screenshots {
  padding: 20px 0 60px;
  background: var(--bg);
  overflow: hidden;
}

.screenshots-grid {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 24px;
}

.screenshot {
  flex: 0 0 auto;
  width: 220px;
  text-align: center;
}

.screenshot img {
  width: 100%;
  height: auto;
  border-radius: 24px;
  box-shadow: 0 8px 40px rgb(0 0 0 / 0.1);
}

.screenshot figcaption {
  margin-top: 14px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.screenshot-featured {
  width: 250px;
}

@media (width < 640px) {
  .screenshots-grid {
    gap: 12px;
  }

  .screenshot {
    width: 140px;
  }

  .screenshot-featured {
    width: 160px;
  }

  .screenshot img {
    border-radius: 16px;
  }

  .screenshot figcaption {
    font-size: 0.75rem;
    margin-top: 10px;
  }
}

@media (width >= 640px) and (width < 960px) {
  .screenshot {
    width: 180px;
  }

  .screenshot-featured {
    width: 210px;
  }
}

/* ── Highlights ── */
.highlights {
  padding: 60px 0;
  background: var(--bg-alt);
}

.highlights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (width >= 640px) {
  .highlights-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.highlight-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--card-shadow);
}

.highlight-emoji {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 16px;
}

.highlight-title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.highlight-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ── Features Grid ── */
.features {
  padding: 80px 0;
  background: var(--bg);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: 48px;
}

.feature-groups {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (width >= 640px) {
  .feature-groups {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (width >= 1024px) {
  .feature-groups {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-group {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 28px 24px;
  box-shadow: var(--card-shadow);
}

.feature-group-title {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
  color: var(--accent);
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-list li {
  font-size: 0.92rem;
  line-height: 1.45;
  color: var(--text-secondary);
}

.feature-icon {
  margin-right: 6px;
}

/* ── CTA ── */
.cta {
  padding: 80px 0;
  text-align: center;
  background: var(--bg-alt);
}

.cta-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.cta-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* ── Footer ── */
.footer {
  padding: 24px 0;
  background: var(--footer-bg);
  border-top: 1px solid var(--footer-border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

/* ── Coming Soon Badge ── */
.coming-soon-badge {
  display: inline-block;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  border: 2px solid var(--card-border);
  border-radius: 12px;
  padding: 12px 32px;
  letter-spacing: -0.01em;
}

.nav-cta.coming-soon {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 6px 14px;
}

/* ── Fade-in Animation ── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}