/* ============================================
   Pulstick Landing Page Styles
   Minimal, dark-mode ready, responsive
   ============================================ */

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

:root {
  --bg: #fafafa;
  --bg-secondary: #f0f0f0;
  --text: #1a1a1a;
  --text-secondary: #555;
  --accent: #e85d3a;
  --accent-hover: #d14a28;
  --accent-glow: rgba(232, 93, 58, 0.25);
  --card-bg: #fff;
  --card-border: #e0e0e0;
  --footer-bg: #f5f5f5;
  --radius: 12px;
  --transition: 0.3s ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f14;
    --bg-secondary: #18181f;
    --text: #e8e8ec;
    --text-secondary: #9a9aaa;
    --accent: #f06b45;
    --accent-hover: #ff7f5c;
    --accent-glow: rgba(240, 107, 69, 0.3);
    --card-bg: #1a1a24;
    --card-border: #2a2a38;
    --footer-bg: #111118;
  }
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

/* --- Utility --- */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

/* --- Header / Nav --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 250, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  transition: background var(--transition);
}

@media (prefers-color-scheme: dark) {
  .site-header {
    background: rgba(15, 15, 20, 0.8);
  }
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.site-logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 1.2s ease-in-out infinite;
}

.header-cta {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  transition: background var(--transition), transform var(--transition);
}

.header-cta:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
}

/* --- Hero --- */
.hero {
  padding: 140px 0 100px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 0.03em;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero-tagline {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 40px;
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 10px;
  transition: background var(--transition), transform var(--transition),
    box-shadow var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

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

.btn-secondary:hover {
  background: var(--card-bg);
  transform: translateY(-2px);
}

.hero-note {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 8px;
}

/* --- Screenshot --- */
.screenshot-wrapper {
  margin-top: 64px;
  display: flex;
  justify-content: center;
}

.screenshot {
  border-radius: 12px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.2);
  max-width: 100%;
  height: auto;
}

/* --- Pulse Animation --- */
@keyframes pulse-dot {
  0%,
  100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.5);
    opacity: 0.6;
  }
}

/* --- Features --- */
.features {
  padding: 100px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

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

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
  .feature-card:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
  }
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* --- Install --- */
.install {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.install-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
  margin-top: 8px;
}

.install-step {
  text-align: center;
  padding: 20px;
}

.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.install-step h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.install-step p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.install-step code {
  display: inline-block;
  background: #1e1e2e;
  color: #ccc;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.82rem;
  margin-top: 4px;
}

@media (prefers-color-scheme: dark) {
  .install-step code {
    background: #0a0a10;
  }
}

/* --- Footer --- */
.site-footer {
  padding: 48px 0;
  background: var(--footer-bg);
  border-top: 1px solid var(--card-border);
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

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

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

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .hero {
    padding: 120px 0 64px;
  }

  .section-title {
    font-size: 1.5rem;
    margin-bottom: 32px;
  }

  .features {
    padding: 64px 0;
  }

  .install {
    padding: 64px 0;
  }

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

  .install-steps {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

/* --- Accessibility --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Skip link for keyboard nav */
.skip-link {
  position: absolute;
  top: -100%;
  left: 8px;
  z-index: 200;
  background: var(--accent);
  color: #fff;
  padding: 8px 16px;
  border-radius: 0 0 8px 8px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: top 0.2s;
}

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