@import url("https://fonts.googleapis.com/css2?family=Libre+Baskerville:wght@400;700&family=Source+Sans+3:wght@400;600;700&display=swap");

:root {
  --bg: #f3f6fa;
  --bg-accent: #e7edf5;
  --surface: rgba(15, 23, 42, 0.94);
  --panel: rgba(255, 255, 255, 0.96);
  --panel-edge: rgba(148, 163, 184, 0.24);
  --text: #1e293b;
  --muted: #64748b;
  --accent: #2563eb;
  --accent-soft: #93c5fd;
  --accent-deep: #0f172a;
  --shadow: rgba(15, 23, 42, 0.08);
  --glow: rgba(37, 99, 235, 0.1);
  --header-start: #0f172a;
  --header-end: #1e293b;
  --active-tab: rgba(147, 197, 253, 0.16);
  --rule-fade: rgba(37, 99, 235, 0.16);
}

body[data-theme="emerald"] {
  --bg: #eff8f3;
  --bg-accent: #dfefe5;
  --panel-edge: rgba(110, 145, 126, 0.24);
  --text: #1b2d24;
  --muted: #5f766a;
  --accent: #0f8a5f;
  --accent-soft: #86d6b7;
  --accent-deep: #143c2f;
  --glow: rgba(15, 138, 95, 0.1);
  --header-start: #10281f;
  --header-end: #1b3c30;
  --active-tab: rgba(134, 214, 183, 0.18);
  --rule-fade: rgba(15, 138, 95, 0.14);
}

body[data-theme="burgundy"] {
  --bg: #faf3f5;
  --bg-accent: #f2e5e9;
  --panel-edge: rgba(147, 110, 120, 0.24);
  --text: #321d24;
  --muted: #7e5d67;
  --accent: #a33256;
  --accent-soft: #efb0c4;
  --accent-deep: #4a1d2c;
  --glow: rgba(163, 50, 86, 0.1);
  --header-start: #32111d;
  --header-end: #522131;
  --active-tab: rgba(239, 176, 196, 0.18);
  --rule-fade: rgba(163, 50, 86, 0.14);
}

body[data-theme="charcoal"] {
  --bg: #f5f5f6;
  --bg-accent: #ebedf0;
  --panel-edge: rgba(120, 128, 139, 0.24);
  --text: #20242b;
  --muted: #68717d;
  --accent: #475569;
  --accent-soft: #c1c9d4;
  --accent-deep: #111827;
  --glow: rgba(71, 85, 105, 0.08);
  --header-start: #151b25;
  --header-end: #2a3442;
  --active-tab: rgba(193, 201, 212, 0.18);
  --rule-fade: rgba(71, 85, 105, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Source Sans 3", sans-serif;
  background:
    radial-gradient(circle at top left, var(--glow), transparent 24%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 45%, var(--bg-accent) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
  opacity: 0.4;
}

.site-shell {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 28px 0 56px;
  position: relative;
}

.theme-switcher {
  position: absolute;
  top: 34px;
  right: -40px;
  z-index: 4;
}

.theme-toggle,
.theme-swatch {
  width: 24px;
  height: 24px;
  border: 1px solid rgba(255, 255, 255, 0.92);
  padding: 0;
  cursor: pointer;
}

.theme-toggle {
  display: block;
  background: var(--accent);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.18);
}

.theme-options {
  position: absolute;
  top: 0;
  right: 34px;
  display: none;
  grid-template-columns: repeat(4, 24px);
  gap: 8px;
  padding: 10px;
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.18);
}

.theme-options.is-open {
  display: grid;
}

.theme-swatch-blue {
  background: #2563eb;
}

.theme-swatch-emerald {
  background: #0f8a5f;
}

.theme-swatch-burgundy {
  background: #a33256;
}

.theme-swatch-charcoal {
  background: #475569;
}

.theme-swatch.is-active,
.theme-toggle:focus-visible,
.theme-swatch:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

.site-header,
.panel {
  border: 1px solid var(--panel-edge);
  background: var(--panel);
  box-shadow: 0 16px 30px var(--shadow);
}

.site-header {
  margin-bottom: 18px;
  padding: 20px 22px 30px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--header-start), var(--header-end));
}

.top-nav {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 1rem;
}

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

.menu-toggle {
  display: none;
  border: 1px solid var(--panel-edge);
  background: rgba(255, 255, 255, 0.1);
  color: #f5fbff;
  border-radius: 4px;
  padding: 0.75rem 1rem;
  font: inherit;
  font-weight: 600;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-left: 0;
}

.nav-links a {
  padding: 0.45rem 0.75rem;
  border-radius: 4px;
  font-weight: 600;
  color: #dbeeff;
}

.nav-links a[aria-current="page"] {
  background: var(--active-tab);
  color: #ffffff;
}

.hero {
  padding: 56px 12px 12px;
}

.hero-compact {
  padding-top: 40px;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--accent-soft);
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1,
h2 {
  margin: 0;
  font-family: "Libre Baskerville", serif;
}

h1 {
  font-size: clamp(2.6rem, 7vw, 4.75rem);
  color: #ffffff;
}

.hero-text {
  max-width: 58ch;
  margin: 1rem 0 0;
  font-size: 1.12rem;
  line-height: 1.75;
  color: rgba(226, 232, 240, 0.92);
}

.content-grid,
.content-stack {
  display: grid;
  gap: 16px;
}

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

.panel {
  padding: 26px 28px;
  border-radius: 4px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.96));
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.panel:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 36px rgba(15, 23, 42, 0.1);
  border-color: rgba(37, 99, 235, 0.24);
}

.panel-enter {
  opacity: 0;
  transform: translateY(18px) scale(0.985);
}

.panel-enter.panel-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition:
    opacity 420ms ease,
    transform 420ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
}

.panel-wide {
  grid-column: 1 / -1;
}

h2 {
  margin-bottom: 14px;
  font-size: 1.4rem;
  color: var(--accent-deep);
}

h2::after {
  content: "";
  display: block;
  width: 100%;
  height: 2px;
  margin-top: 0.7rem;
  border-radius: 0;
  background: linear-gradient(90deg, var(--accent), rgba(37, 99, 235, 0.16));
  background: linear-gradient(90deg, var(--accent), var(--rule-fade));
}

p,
li {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.7;
}

.meta {
  margin-bottom: 12px;
  color: var(--muted);
  font-weight: 600;
}

.section-linkout {
  margin-top: 1rem;
  color: var(--muted);
}

ul {
  margin: 0;
  padding-left: 1.25rem;
}

li + li,
p + p {
  margin-top: 0.55rem;
}

a {
  font-weight: 600;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

@media (max-width: 760px) {
  .site-shell {
    width: min(100% - 1rem, 1080px);
    padding-top: 14px;
  }

  .theme-switcher {
    top: 18px;
    right: 8px;
  }

  .theme-options {
    top: 34px;
    right: 0;
    grid-template-columns: repeat(2, 24px);
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
  }

  .top-nav {
    flex-wrap: wrap;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    padding-top: 0.75rem;
  }

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

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

  .panel-wide {
    grid-column: auto;
  }

  .hero {
    padding: 34px 4px 4px;
  }

  .panel {
    padding: 22px 20px;
  }
}