/* NoiseRecord — brand tokens (aligned with iOS app themes) */
:root {
  --accent-standard: #2e8cb8;
  --accent-standard-2: #1fad85;
  --accent-high: #ff731f;
  --accent-high-2: #b85af2;
  --bg: #0b0f14;
  --bg-card: #141b24;
  --bg-elevated: #1a2330;
  --text: #e8edf4;
  --text-muted: #8b9cb3;
  --border: rgba(46, 140, 184, 0.22);
  --radius: 14px;
  --max-width: 1100px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a:hover { text-decoration: underline; }

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

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 20, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
}

.logo:hover { text-decoration: none; }

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent-standard), var(--accent-standard-2));
  display: grid;
  place-items: center;
  font-size: 1.1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.nav-links a:hover { color: var(--text); text-decoration: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s, opacity 0.15s;
}

.btn:hover { text-decoration: none; transform: translateY(-1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent-standard), var(--accent-standard-2));
  color: #fff;
}

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

.btn-disabled {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

/* Hero */
.hero {
  padding: 4.5rem 0 3.5rem;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(46, 140, 184, 0.15);
  color: var(--accent-standard);
  border: 1px solid var(--border);
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent-standard) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 36rem;
  margin: 0 auto 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* Sections */
section {
  padding: 3.5rem 0;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-standard);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 0.75rem;
}

.section-desc {
  color: var(--text-muted);
  max-width: 40rem;
  margin: 0 0 2rem;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: rgba(46, 140, 184, 0.45);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  margin-bottom: 1rem;
  background: rgba(46, 140, 184, 0.14);
}

.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.feature-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Mode comparison */
.mode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
}

.mode-card {
  border-radius: var(--radius);
  padding: 1.75rem;
  border: 1px solid var(--border);
}

.mode-card.standard {
  background: linear-gradient(160deg, rgba(46, 140, 184, 0.12), var(--bg-card));
}

.mode-card.high-sensitivity {
  background: linear-gradient(160deg, rgba(255, 115, 31, 0.12), var(--bg-card));
  border-color: rgba(255, 115, 31, 0.25);
}

.mode-card .badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  margin-bottom: 0.75rem;
}

.mode-card.standard .badge {
  background: rgba(46, 140, 184, 0.2);
  color: var(--accent-standard);
}

.mode-card.high-sensitivity .badge {
  background: rgba(255, 115, 31, 0.2);
  color: var(--accent-high);
}

.mode-card h3 { margin: 0 0 0.5rem; }
.mode-card p { margin: 0; color: var(--text-muted); font-size: 0.92rem; }

/* Disclaimer */
.disclaimer-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Download CTA */
.cta-section {
  text-align: center;
  background: linear-gradient(180deg, transparent, rgba(46, 140, 184, 0.06));
  border-top: 1px solid var(--border);
}

.cta-section .coming-soon {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
}

/* Content pages */
.page-hero {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

.page-hero p {
  margin: 0;
  color: var(--text-muted);
}

.prose {
  padding: 2.5rem 0 4rem;
  max-width: 42rem;
}

.prose h2 {
  font-size: 1.2rem;
  margin: 2rem 0 0.75rem;
  color: var(--text);
}

.prose h2:first-child { margin-top: 0; }

.prose p, .prose li {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.prose ul {
  padding-left: 1.25rem;
}

.prose li { margin-bottom: 0.4rem; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 2rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.88rem;
}

.copyright {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Mobile nav */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 0.25rem;
}

@media (max-width: 640px) {
  .menu-toggle { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
  }

  .nav-links.open { display: flex; }

  .header-inner { position: relative; }
}