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

:root {
  --bg: #ffffff;
  --bg-secondary: #f5f5f7;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --border: #d2d2d7;
  --accent: #007AFF;
  --hero-from: #f9a8d4;
  --hero-via: #d8b4fe;
  --hero-to: #a5b4fc;
  --window-bg: #f6f6f6;
  --window-toolbar: #e8e8e8;
  --shadow-color: rgba(0, 0, 0, 0.12);
  --card-bg: #ffffff;
  --code-bg: #f0f0f0;
  --footer-bg: #1d1d1f;
  --footer-text: #f5f5f7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d1d1f;
    --bg-secondary: #2c2c2e;
    --text: #f5f5f7;
    --text-secondary: #a1a1a6;
    --border: #3a3a3c;
    --hero-from: #831843;
    --hero-via: #581c87;
    --hero-to: #312e81;
    --window-bg: #2c2c2e;
    --window-toolbar: #3a3a3c;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --card-bg: #2c2c2e;
    --code-bg: #3a3a3c;
    --footer-bg: #000000;
    --footer-text: #a1a1a6;
  }
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "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;
}

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

a:hover {
  text-decoration: underline;
}

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

/* ── Hero ─────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--hero-from), var(--hero-via), var(--hero-to));
  text-align: center;
  padding: 5rem 1.5rem 3rem;
}

.hero-icon {
  width: 128px;
  height: 128px;
  border-radius: 28px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
  margin: 0 auto 1.5rem;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #1d1d1f;
  margin-bottom: 0.5rem;
}

.hero .tagline {
  font-size: 1.25rem;
  color: #3a3a3c;
  max-width: 600px;
  margin: 0 auto 2rem;
  font-weight: 400;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  text-decoration: none;
}

.btn-primary {
  background: #1d1d1f;
  color: #ffffff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.85);
  color: #1d1d1f;
  backdrop-filter: blur(8px);
}

/* ── macOS Window Frame ───────────────────────────────── */
.main-screenshot {
  max-width: 1100px;
  margin: -2rem auto 0;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.window-frame {
  background: var(--window-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px var(--shadow-color), 0 0 0 1px var(--border);
}

.window-toolbar {
  background: var(--window-toolbar);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}

.traffic-light {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.traffic-light.red {
  background: #ff5f57;
}

.traffic-light.yellow {
  background: #febc2e;
}

.traffic-light.green {
  background: #28c840;
}

.window-frame img {
  display: block;
  width: 100%;
}

/* Dark variant for dark-mode screenshot */
.window-frame-dark {
  background: #1e1e1e;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), 0 0 0 1px #3a3a3c;
}

.window-frame-dark .window-toolbar {
  background: #2c2c2e;
  border-bottom-color: #3a3a3c;
}

/* Showcase: transparent traffic-light overlay on top of screenshot */
.showcase-image .window-frame {
  position: relative;
  container-type: inline-size;
}

.showcase-image .window-toolbar {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  background: none;
  border-bottom: none;
  padding: 2.5cqi 2.5cqi;
  gap: 1.4cqi;
}

.showcase-image .traffic-light {
  width: 2.5cqi;
  height: 2.5cqi;
}

/* ── Screenshot placeholder (until real screenshots exist) */
.screenshot-placeholder {
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
  min-height: 300px;
  padding: 2rem;
  text-align: center;
}

.main-screenshot .screenshot-placeholder {
  min-height: 500px;
}

/* ── Section layout ───────────────────────────────────── */
.section {
  padding: 5rem 1.5rem;
}

.section-alt {
  background: var(--bg-secondary);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  font-size: 1.1rem;
}

/* ── Features Grid ────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.75rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--shadow-color);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* ── Screenshot Showcase ──────────────────────────────── */
.showcase-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  margin-bottom: 4rem;
}

.showcase-item:last-child {
  margin-bottom: 0;
}

.showcase-item.reverse {
  direction: rtl;
}

.showcase-item.reverse > * {
  direction: ltr;
}

.showcase-text h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.showcase-text p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.6;
}

.showcase-image .window-frame {
  box-shadow: 0 12px 40px var(--shadow-color), 0 0 0 1px var(--border);
}

/* ── Footer ───────────────────────────────────────────── */
.footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 3rem 1.5rem;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--footer-text);
  font-weight: 500;
  transition: opacity 0.15s;
}

.footer-links a:hover {
  opacity: 0.7;
  text-decoration: none;
}

.footer .credit {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 900px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .showcase-item {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .showcase-item.reverse {
    direction: ltr;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .hero .tagline {
    font-size: 1.1rem;
  }
}

@media (max-width: 600px) {
  .features-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 3rem 1rem 2rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .section {
    padding: 3rem 1rem;
  }

  .section-title {
    font-size: 1.5rem;
  }
}