/* =========================================================
   DaF — boulingua design system
   Identical palette + typography across all four sites
   (EFL, FLE, DaF, Ressourcen). Only navbar and badges differ.
   ========================================================= */

:root {
  /* Light palette */
  --bg: #ffffff;
  --fg: #23272b;
  --fg-alt: #555;
  --rule: #eaeaea;
  --surface: #f7f8fa;
  --accent: #1a73e8;
  --accent-hover: #0b57d0;
  --code-bg: #f5f5f5;
}

[data-bs-theme="dark"] {
  --bg: #1d1f21;
  --fg: #e8e8e8;
  --fg-alt: #a8a8a8;
  --rule: #2d3035;
  --surface: #26292c;
  --accent: #79b8ff;
  --accent-hover: #b8d4fd;
  --code-bg: #2a2d31;
}

/* OS dark preference on first visit (before any toggle) */
@media (prefers-color-scheme: dark) {
  :root:not([data-bs-theme]) {
    --bg: #1d1f21;
    --fg: #e8e8e8;
    --fg-alt: #a8a8a8;
    --rule: #2d3035;
    --surface: #26292c;
    --accent: #79b8ff;
    --accent-hover: #b8d4fd;
    --code-bg: #2a2d31;
  }
}

/* Force Bootstrap's own variables to track the palette. Without this,
   flatly/darkly cascade into each other and the toggle only half works. */
:root,
[data-bs-theme="light"],
[data-bs-theme="dark"] {
  --bs-body-bg: var(--bg);
  --bs-body-color: var(--fg);
  --bs-border-color: var(--rule);
  --bs-secondary-bg: var(--surface);
  --bs-tertiary-bg: var(--surface);
  --bs-emphasis-color: var(--fg);
  --bs-link-color: var(--accent);
  --bs-link-hover-color: var(--accent-hover);
  --bs-heading-color: var(--fg);
  --bs-primary: var(--accent);
}

/* Base body: stop stock themes bleeding through */
html, body {
  background: var(--bg) !important;
  color: var(--fg);
  font-family: "Source Sans 3", -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Navbar — quiet, monochrome brand, accent on hover */
.navbar,
.navbar-default,
nav.navbar {
  background: var(--bg) !important;
  border-bottom: 1px solid var(--rule);
}

.navbar .navbar-brand {
  font-family: "JetBrains Mono", monospace;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--fg) !important;
}

.navbar .nav-link,
.navbar .navbar-nav .nav-link {
  color: var(--fg-alt) !important;
  font-weight: 500;
}

.navbar .nav-link:hover,
.navbar .nav-link:focus,
.navbar .nav-link.active {
  color: var(--accent) !important;
}

/* Footer matches body */
.nav-footer,
.page-footer,
footer {
  background: var(--bg) !important;
  color: var(--fg-alt);
  border-top: 1px solid var(--rule);
}

.nav-footer a,
.page-footer a,
footer a {
  color: var(--accent);
}

/* Hero block (used on landing pages) */
.hero-kicker {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.hero-block h1 {
  font-size: 2.2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--fg);
}

.hero-block .lead {
  font-size: 1.15rem;
  color: var(--fg-alt);
  max-width: 42em;
}

/* Card grid for course / unit listings */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.card-grid .card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 1rem 1.1rem;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.card-grid .card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.card-grid .card h3 {
  font-size: 1rem;
  margin: 0 0 0.4rem 0;
  color: var(--fg);
}

.card-grid .card p {
  color: var(--fg-alt);
  margin: 0;
  font-size: 0.92rem;
}

/* Lucide icon helper — inline in prose */
.icon-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.6em;
  height: 1.6em;
  border-radius: 50%;
  background: var(--surface);
  color: var(--accent);
  vertical-align: middle;
  margin: 0 0.1em;
}

.icon-circle svg {
  width: 1em;
  height: 1em;
}

/* Generic meme-template frame on slides (never real memes) */
.meme-frame {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.6rem;
  max-width: 100%;
}

.meme-frame svg {
  max-width: 100%;
  height: auto;
}

/* CEFR level badges (A1 green → C1 dark red) */
.cefr-badge {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-weight: 500;
  font-size: 0.78rem;
  padding: 0.15em 0.55em;
  border-radius: 4px;
  letter-spacing: 0.04em;
}

.cefr-badge.a1 { background: #c6f1cf; color: #1c5e2b; }
.cefr-badge.a2 { background: #bfe9e4; color: #0f574f; }
.cefr-badge.b1 { background: #c8dcff; color: #0b4da8; }
.cefr-badge.b2 { background: #d8c9f0; color: #4a1f8e; }
.cefr-badge.c1 { background: #f1c6c6; color: #8c1c1c; }

[data-bs-theme="dark"] .cefr-badge.a1 { background: #1c4b29; color: #a9e4b6; }
[data-bs-theme="dark"] .cefr-badge.a2 { background: #0f4641; color: #9ad3cc; }
[data-bs-theme="dark"] .cefr-badge.b1 { background: #123d82; color: #bad0f8; }
[data-bs-theme="dark"] .cefr-badge.b2 { background: #3a1876; color: #d1beef; }
[data-bs-theme="dark"] .cefr-badge.c1 { background: #701818; color: #eeb9b9; }

/* Tables in prose — slightly quieter by default */
table {
  border-collapse: collapse;
}

table th,
table td {
  border-color: var(--rule);
}

/* Code blocks */
code, pre {
  background: var(--code-bg);
}

/* Callouts — keep them on the palette */
.callout {
  background: var(--surface);
  border-color: var(--rule);
}