/* ============================================================
   Design tokens
   ============================================================ */
:root {
  /* Neutral base */
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-alt: #f0f2f6;
  --border: #dde1e9;

  /* Dark hero */
  --hero-bg: #0b1220;
  --hero-surface: #131c2e;
  --hero-border: #1f2d44;
  --hero-text: #f1f5f9;
  --hero-muted: #8fa3bf;

  /* Typography */
  --ink: #0f172a;
  --muted: #5c6a7f;

  /* Accent */
  --accent: #1a6fbf;
  --accent-dark: #145599;
  --accent-light: #e8f2fb;

  /* Status */
  --green: #15803d;
  --green-bg: #f0fdf4;
  --green-border: #86efac;
  --amber: #b45309;
  --amber-bg: #fffbeb;
  --amber-border: #fcd34d;
  --red: #b91c1c;
  --red-bg: #fef2f2;
  --red-border: #fca5a5;

  /* Elevation */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.10), 0 2px 4px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12), 0 4px 12px rgba(15, 23, 42, 0.07);
}

/* ============================================================
   Reset & base
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

code {
  font-family: "IBM Plex Mono", "Courier New", monospace;
  font-size: 0.875em;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.15em 0.4em;
}

/* ============================================================
   Layout helpers
   ============================================================ */
.container {
  width: min(1140px, 92vw);
  margin: 0 auto;
}

.section-stack {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 2.5rem 0 3rem;
}

/* ============================================================
   Navigation
   ============================================================ */
.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
}

/* Hero nav — sits on dark bg */
.hero .top-nav {
  border-bottom: 1px solid var(--hero-border);
}

/* Subpage nav — light bg */
.subpage-header .top-nav {
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
}

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

.subpage-header .brand {
  color: var(--ink);
}

.brand img {
  width: 28px;
  height: 28px;
}

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

/* Hero nav links */
.hero .nav-links a {
  color: var(--hero-muted);
}

.hero .nav-links a:hover,
.hero .nav-links a.active {
  color: var(--hero-text);
  border-color: var(--hero-border);
  background: rgba(255, 255, 255, 0.06);
}

/* Subpage nav links */
.subpage-header .nav-links a {
  color: var(--muted);
}

.subpage-header .nav-links a:hover,
.subpage-header .nav-links a.active {
  color: var(--ink);
  border-color: var(--border);
  background: var(--surface-alt);
}

/* ============================================================
   Hero section (dark)
   ============================================================ */
.hero {
  position: relative;
  overflow: clip;
  background: var(--hero-bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(26, 111, 191, 0.25), transparent),
    radial-gradient(ellipse 60% 40% at 80% 90%, rgba(14, 80, 150, 0.18), transparent);
}

.noise {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.08'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

.hero-content {
  padding: 3.5rem 0 3.75rem;
}

.logo {
  width: clamp(140px, 22vw, 220px);
  animation: fadeInUp 0.65s ease both;
}

/* ============================================================
   Typography
   ============================================================ */
h1,
h2,
h3,
h4 {
  font-family: "Inter", "Manrope", "Segoe UI", system-ui, sans-serif;
  font-weight: 700;
  line-height: 1.22;
  margin: 0 0 0.65rem;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.05rem;
  letter-spacing: -0.005em;
}

.hero h1 {
  color: var(--hero-text);
  max-width: 20ch;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 0.9rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.hero .kicker {
  color: #7db8e8;
  background: rgba(26, 111, 191, 0.18);
  border: 1px solid rgba(26, 111, 191, 0.35);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
}

.subpage-header .kicker {
  color: var(--accent);
  background: var(--accent-light);
  border: 1px solid rgba(26, 111, 191, 0.25);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
}

.lead {
  font-size: 1.05rem;
  max-width: 62ch;
  margin: 0.6rem 0 0;
}

.hero .lead {
  color: var(--hero-muted);
}

body:not(.hero) .lead,
.lead {
  color: var(--muted);
}

/* ============================================================
   Subpage header (light)
   ============================================================ */
.subpage-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding-bottom: 2rem;
}

.subpage-header h1 {
  margin-top: 0.4rem;
  color: var(--ink);
}

/* ============================================================
   Buttons
   ============================================================ */
.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  border-radius: 7px;
  padding: 0.6rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background 0.18s ease, box-shadow 0.18s ease, transform 0.14s ease, border-color 0.18s ease;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn.primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(26, 111, 191, 0.35);
}

.btn.primary:hover {
  background: var(--accent-dark);
  box-shadow: 0 4px 14px rgba(26, 111, 191, 0.4);
}

.btn.ghost {
  border-color: var(--hero-border);
  color: var(--hero-text);
  background: rgba(255, 255, 255, 0.06);
}

.btn.ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
}

.btn.outline {
  border-color: var(--border);
  color: var(--ink);
  background: var(--surface);
}

.btn.outline:hover {
  background: var(--surface-alt);
  border-color: #c6cad3;
}

/* ============================================================
   Cards
   ============================================================ */
.card,
.module {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.4rem 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.card:hover,
.module:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: #c8cdd8;
}

.card h2:first-child,
.card h3:first-child {
  margin-top: 0;
}

/* ============================================================
   Grid layouts
   ============================================================ */
.grid-two {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.module-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 1rem;
}

.section {
  margin-top: 0.5rem;
}

/* ============================================================
   Status / badge components
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: 999px;
  padding: 0.22rem 0.65rem;
  border: 1px solid;
}

.badge.green  { color: var(--green);  background: var(--green-bg);  border-color: var(--green-border); }
.badge.amber  { color: var(--amber);  background: var(--amber-bg);  border-color: var(--amber-border); }
.badge.red    { color: var(--red);    background: var(--red-bg);    border-color: var(--red-border);   }

/* Legacy alias */
.warning {
  border-color: var(--amber-border);
  background: var(--amber-bg);
  color: var(--amber);
}

.warning h2,
.warning h3 {
  color: var(--amber);
}

/* ============================================================
   Section dividers and labels
   ============================================================ */
.section-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--muted);
  margin-bottom: 0.9rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

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

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

.footer-brand {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}

.footer-meta {
  font-size: 0.82rem;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.82rem;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* ============================================================
   Reveal animation
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   Desktop app surface
   ============================================================ */
.app-hero {
  padding-bottom: 1.5rem;
}

.app-hero-content {
  padding-top: 1.75rem;
  padding-bottom: 1.25rem;
}

.app-logo {
  width: clamp(160px, 24vw, 220px);
}

.app-layout {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 300px 1fr;
}

.app-shell-panel {
  padding-bottom: 2.5rem;
}

.app-side,
.app-main {
  min-height: 400px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.75rem;
  border: 1px solid var(--green-border);
  background: var(--green-bg);
  color: var(--green);
  border-radius: 999px;
  padding: 0.28rem 0.75rem;
  font-weight: 700;
  font-size: 0.82rem;
}

.status-pill::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

.stats-grid {
  margin-top: 1rem;
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.baseline-grid {
  margin-bottom: 1.75rem;
}

.stats-grid article {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  background: var(--surface);
  transition: box-shadow 0.18s ease, border-color 0.18s ease;
}

.stats-grid article:hover {
  box-shadow: var(--shadow-sm);
  border-color: #c6cad3;
}

.stats-grid h3 {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 0.3rem;
}

.stats-grid p {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.download-cta {
  margin: 1rem 0 0.75rem;
}

.app-note {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.deployment-controls {
  margin-top: 1.25rem;
  border-top: 1px solid var(--border);
  padding-top: 1.1rem;
}

.action-btn {
  width: 100%;
  border: none;
  border-radius: 8px;
  padding: 0.55rem 1rem;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  box-shadow: 0 1px 4px rgba(26, 111, 191, 0.3);
  transition: background 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
  letter-spacing: 0.01em;
}

.action-btn:hover:not(:disabled) {
  background: var(--accent-dark);
  box-shadow: 0 3px 10px rgba(26, 111, 191, 0.38);
}

.action-btn:disabled {
  cursor: wait;
  opacity: 0.55;
}

/* ============================================================
   Keyframes
   ============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .app-layout {
    grid-template-columns: 1fr;
  }

  .app-side,
  .app-main {
    min-height: unset;
  }
}

@media (max-width: 680px) {
  .top-nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-content {
    padding-top: 2rem;
    padding-bottom: 2.5rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ============================================================
   Utility
   ============================================================ */
ul {
  padding-left: 1.25rem;
  margin: 0.5rem 0 0;
}

ul li {
  margin-bottom: 0.3rem;
  color: var(--muted);
}

p {
  margin: 0 0 0.65rem;
}

p:last-child {
  margin-bottom: 0;
}