:root {
  --ink: #0f172a;
  --ink-soft: #334155;
  --teal: #0f766e;
  --teal-bright: #0ea5a7;
  --amber: #f59e0b;
  --mist: #f4fbfb;
  --fog: #e6f1f6;
  --line: #cbd5e1;
  --white: #ffffff;
  --danger: #9f1239;
  --bg-burst-a: #d4edf2;
  --bg-burst-b: #dbe7f5;
  --bg-grad-mid: #f9fcfd;
  --bg-grad-end: #f6fbfd;
  --header-bg: rgba(244, 251, 251, 0.86);
  --header-border: rgba(15, 23, 42, 0.08);
  --panel-bg: rgba(255, 255, 255, 0.84);
  --alert-bg: #fff1f4;
  --alert-border: rgba(159, 18, 57, 0.22);
  --alert-ink: #4c0519;
  --doc-bg: #ffffff;
  --footer-bg: rgba(255, 255, 255, 0.9);
  --mobile-nav-bg: rgba(255, 255, 255, 0.98);
  --maxw: 1160px;
  --shadow: 0 20px 46px rgba(15, 23, 42, 0.14);
}

html[data-theme="dark"] {
  --ink: #e2e8f0;
  --ink-soft: #a8b8ce;
  --teal: #2dd4bf;
  --teal-bright: #22d3ee;
  --amber: #fbbf24;
  --mist: #040914;
  --fog: #0b1220;
  --line: #334155;
  --white: #0f172a;
  --danger: #fb7185;
  --bg-burst-a: rgba(6, 78, 59, 0.24);
  --bg-burst-b: rgba(30, 58, 138, 0.24);
  --bg-grad-mid: #091423;
  --bg-grad-end: #050b16;
  --header-bg: rgba(5, 12, 24, 0.88);
  --header-border: rgba(148, 163, 184, 0.2);
  --panel-bg: rgba(15, 23, 42, 0.82);
  --alert-bg: rgba(127, 29, 29, 0.2);
  --alert-border: rgba(248, 113, 113, 0.4);
  --alert-ink: #fecaca;
  --doc-bg: rgba(15, 23, 42, 0.9);
  --footer-bg: rgba(2, 6, 23, 0.82);
  --mobile-nav-bg: rgba(3, 10, 22, 0.98);
  --shadow: 0 22px 60px rgba(2, 6, 23, 0.75);
}

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

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

body {
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 400px at 0 -10%, var(--bg-burst-a) 10%, transparent 60%),
    radial-gradient(900px 420px at 100% 0%, var(--bg-burst-b) 10%, transparent 60%),
    linear-gradient(180deg, var(--mist), var(--bg-grad-mid) 40%, var(--bg-grad-end));
  min-height: 100vh;
  transition: background 220ms ease, color 220ms ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
}

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
}

.brand img {
  width: 46px;
  height: 46px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--white);
}

.brand strong {
  font-family: "Sora", "Avenir Next", sans-serif;
  font-size: 0.95rem;
  line-height: 1.05;
  display: block;
}

.brand span {
  color: var(--ink-soft);
  font-size: 0.8rem;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
  border-radius: 10px;
  padding: 0.45rem 0.6rem;
}

.theme-toggle {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.45rem 0.78rem;
  font-weight: 700;
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  border-color: var(--teal);
  background: rgba(15, 118, 110, 0.12);
  outline: none;
}

.theme-toggle[aria-pressed="true"] {
  background: linear-gradient(90deg, var(--teal), var(--teal-bright));
  color: var(--white);
  border-color: transparent;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--ink);
  text-decoration: none;
  padding: 0.48rem 0.76rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  border-color: rgba(15, 118, 110, 0.28);
  background: rgba(15, 118, 110, 0.08);
  outline: none;
}

.site-nav a.active {
  background: var(--ink);
  color: var(--white);
}

.cta-pill {
  background: linear-gradient(90deg, var(--teal), var(--teal-bright));
  color: var(--white) !important;
}

.hero {
  max-width: var(--maxw);
  margin: 2rem auto 1rem;
  padding: 0 1rem;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.2rem;
}

.hero-card,
.panel {
  background: var(--panel-bg);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 2.1rem 2rem;
}

.kicker {
  letter-spacing: 0.07em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--teal);
}

.hero h1 {
  font-family: "Sora", "Avenir Next", sans-serif;
  font-size: clamp(1.6rem, 2.6vw, 2.7rem);
  margin: 0.55rem 0 0.75rem;
  line-height: 1.15;
}

.hero p {
  color: var(--ink-soft);
  font-size: 1.05rem;
  margin: 0 0 1rem;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.btn {
  display: inline-block;
  text-decoration: none;
  border-radius: 12px;
  padding: 0.72rem 1rem;
  font-weight: 700;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(90deg, var(--teal), var(--teal-bright));
  color: var(--white);
}

.btn-secondary {
  background: var(--white);
  color: var(--ink);
  border-color: var(--line);
}

.hero-side {
  padding: 1rem;
  display: grid;
  align-content: center;
}

.hero-side img {
  width: 100%;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--white);
}

.alert {
  max-width: var(--maxw);
  margin: 1rem auto;
  padding: 0 1rem;
}

.alert-box {
  border: 1px solid var(--alert-border);
  color: var(--alert-ink);
  background: var(--alert-bg);
  border-radius: 14px;
  padding: 0.8rem 1rem;
  font-size: 0.95rem;
}

.main {
  max-width: var(--maxw);
  margin: 1.1rem auto 3rem;
  padding: 0 1rem;
}

.grid {
  display: grid;
  gap: 1rem;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.panel {
  padding: 1.15rem 1.05rem;
}

.panel h2,
.panel h3 {
  margin: 0.1rem 0 0.45rem;
  font-family: "Sora", "Avenir Next", sans-serif;
}

.panel p,
.panel li {
  color: var(--ink-soft);
  margin-top: 0.2rem;
}

.panel ul {
  margin: 0.55rem 0 0;
  padding-left: 1.2rem;
}

.doc-list {
  display: grid;
  gap: 0.55rem;
}

.doc-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.7rem 0.8rem;
  background: var(--doc-bg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.doc-item small {
  color: #64748b;
}

.doc-item a {
  text-decoration: none;
  font-weight: 700;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--footer-bg);
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1rem;
  color: #475569;
  font-size: 0.9rem;
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.fade-in {
  opacity: 0;
  transform: translateY(12px);
  animation: rise 540ms ease forwards;
}

.fade-in.delay-1 {
  animation-delay: 120ms;
}

.fade-in.delay-2 {
  animation-delay: 220ms;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .grid.two,
  .grid.three {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    top: 66px;
    right: 0.8rem;
    left: 0.8rem;
    background: var(--mobile-nav-bg);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 0.5rem;
    box-shadow: var(--shadow);
    display: none;
  }

  .site-nav.open {
    display: grid;
  }

  .site-nav a {
    border-radius: 10px;
  }

  .hero-copy {
    padding: 1.5rem 1.2rem;
  }

  .theme-toggle {
    font-size: 0.82rem;
    padding: 0.38rem 0.62rem;
  }
}