/*
 * Trackify landing page — Midnight Waveform tokens.
 * Palette source of truth: web/app.css custom properties
 * (#0b1326 navy, #4cd7f6 cyan accent, #7c3aed violet accent-soft).
 * Dark-only: there is no prefers-color-scheme branch by design.
 */

:root {
  /* Surfaces — deep navy base, panel tiers (never pure black) */
  --bg: #0b1326;
  --bg-alt: #0e1729;
  --panel-low: #131b2e;
  --panel: #171f33;
  --panel-high: #222a3d;

  /* Text */
  --text-1: #dae2fd;
  --text-2: #b6c1e5;
  --text-3: #99a4c9;

  /* Lines */
  --line: rgba(255, 255, 255, 0.08);
  --divider: #2a3550;

  /* Brand — cyan accent, violet accent-soft, 45deg gradient for CTAs */
  --accent: #4cd7f6;
  --accent-soft: #7c3aed;
  --accent-hover: #7ae1fb;
  --gradient: linear-gradient(45deg, #4cd7f6, #7c3aed);

  /* Radii */
  --r-sm: 8px;
  --r-md: 16px;
  --r-lg: 24px;

  /* Spacing base 8px; container max 1200px */
  --container-max: 1200px;
  --margin: 20px;
  --nav-h: 76px;

  --font:
    'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial,
    sans-serif;
}

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

html {
  scroll-behavior: smooth;
  /* Anchored sections clear the sticky nav */
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-1);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

code {
  font-family: ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--panel-high);
  border: 1px solid var(--divider);
  border-radius: 6px;
  padding: 0.1em 0.35em;
  color: var(--accent);
}

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--margin);
}

@media (min-width: 1024px) {
  :root {
    --margin: 48px;
  }
}

/* ---------- Focus & skip link ---------- */

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 100;
  background: var(--accent);
  color: #06101f;
  padding: 10px 16px;
  border-radius: var(--r-sm);
  text-decoration: none;
  font-weight: 600;
  transition: top 0.2s ease;
}

.skip-link:focus-visible {
  top: 12px;
}

/* ---------- Navigation ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  background: rgba(11, 19, 38, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-mark {
  width: 28px;
  height: 28px;
  flex: none;
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-2);
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--text-1);
}

.nav-github {
  display: inline-flex;
  align-items: center;
  color: var(--text-2);
}

.nav-github:hover {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 8px;
  color: var(--text-1);
  cursor: pointer;
}

.nav-toggle .icon-close {
  display: none;
}

.nav-toggle[aria-expanded='true'] .icon-menu {
  display: none;
}

.nav-toggle[aria-expanded='true'] .icon-close {
  display: block;
}

@media (max-width: 767px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 12px var(--margin) 20px;
    background: rgba(11, 19, 38, 0.97);
    border-bottom: 1px solid var(--line);
    display: none;
  }

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

  .nav-links a {
    padding: 10px 0;
    font-size: 1.05rem;
    width: 100%;
  }
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-glow {
  position: absolute;
  inset: -40% -20% auto;
  height: 140%;
  background:
    radial-gradient(40% 55% at 22% 40%, rgba(76, 215, 246, 0.16), transparent 70%),
    radial-gradient(38% 50% at 78% 45%, rgba(124, 58, 237, 0.18), transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  align-items: center;
  gap: 48px;
  padding-block: 96px 104px;
}

.eyebrow {
  margin: 0 0 16px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.gradient-text {
  background: linear-gradient(90deg, #4cd7f6, #7c3aed);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  margin: 0 0 28px;
  max-width: 56ch;
  font-size: 1.1rem;
  color: var(--text-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 28px;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-chips li {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-3);
  background: var(--panel-low);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-wave {
  width: 100%;
  max-width: 420px;
}

@media (max-width: 899px) {
  .hero-inner {
    grid-template-columns: 1fr;
    padding-block: 72px 80px;
    gap: 40px;
  }

  .hero-visual {
    order: -1;
  }

  .hero-wave {
    max-width: 300px;
  }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--r-sm);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: filter 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
}

.btn-primary:hover {
  filter: brightness(1.12);
}

.btn-ghost {
  border: 1px solid var(--divider);
  color: var(--text-1);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.88rem;
}

/* ---------- Sections ---------- */

.section {
  padding-block: 88px;
}

.section-alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--line);
}

.section-head {
  max-width: 640px;
  margin-bottom: 48px;
}

.section-head h2 {
  margin: 0 0 14px;
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-sub {
  margin: 0;
  color: var(--text-2);
}

/* ---------- Features ---------- */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.feature-card {
  margin: 0;
  background: var(--panel-low);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 26px 24px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.feature-card:hover {
  border-color: rgba(76, 215, 246, 0.45);
  transform: translateY(-2px);
}

.feature-card h3 {
  margin: 16px 0 10px;
  font-size: 1.08rem;
  font-weight: 700;
}

.feature-card p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--text-2);
}

.feature-icon {
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(76, 215, 246, 0.1);
  border: 1px solid rgba(76, 215, 246, 0.25);
  color: var(--accent);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

@media (max-width: 1023px) {
  .features-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 639px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Formats table ---------- */

.formats-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel-low);
}

.formats-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

.formats-table th,
.formats-table td {
  text-align: left;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  font-size: 0.94rem;
}

.formats-table thead th {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  background: var(--panel);
}

.formats-table tbody tr:last-child th,
.formats-table tbody tr:last-child td {
  border-bottom: 0;
}

.formats-table tbody tr:hover {
  background: rgba(76, 215, 246, 0.05);
}

.formats-table tbody th {
  font-weight: 600;
  color: var(--text-1);
  white-space: nowrap;
}

.formats-table td {
  color: var(--text-2);
}

.formats-table td:last-child {
  color: var(--text-3);
}

/* ---------- Self-host band ---------- */

.host-band {
  background:
    radial-gradient(60% 90% at 85% 10%, rgba(124, 58, 237, 0.16), transparent 70%),
    radial-gradient(50% 80% at 10% 90%, rgba(76, 215, 246, 0.1), transparent 70%),
    var(--panel-low);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 48px;
}

.host-copy h2 {
  margin: 0 0 14px;
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.host-copy > p {
  max-width: 62ch;
  color: var(--text-2);
}

.host-code {
  margin: 24px 0;
  padding: 20px 22px;
  background: #081020;
  border: 1px solid var(--divider);
  border-radius: var(--r-sm);
  overflow-x: auto;
}

.host-code code {
  display: block;
  background: none;
  border: 0;
  padding: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-1);
  white-space: pre;
}

.host-code .c {
  color: var(--text-3);
}

.host-note {
  font-size: 0.92rem;
  color: var(--text-3);
}

@media (max-width: 639px) {
  .host-band {
    padding: 28px 20px;
  }
}

/* ---------- Footer ---------- */

.footer {
  border-top: 1px solid var(--line);
  background: var(--bg-alt);
  padding-block: 56px 40px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr 1.4fr;
  gap: 40px;
}

.footer h3 {
  margin: 0 0 14px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.footer-brand .brand-mark {
  width: 26px;
  height: 26px;
}

.footer-brand p {
  margin: 4px 0 0;
  font-size: 0.92rem;
  color: var(--text-2);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-2);
  font-size: 0.94rem;
}

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

.footer-credits p {
  margin: 0 0 12px;
  font-size: 0.9rem;
  color: var(--text-2);
}

.footer-credits a {
  color: var(--text-1);
  text-decoration-color: rgba(76, 215, 246, 0.5);
  text-underline-offset: 3px;
}

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

.footer-legal {
  font-size: 0.82rem;
  color: var(--text-3);
}

@media (max-width: 899px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* ---------- Scroll reveal (JS enhancement only) ---------- */

html.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

html.js .reveal.revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  html.js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}