/* clrsrc.de — Dark/technisches Theme. Keine externen Abhängigkeiten. */

:root {
  --bg:        #0d1117;
  --bg-grad:   #0a0d12;
  --surface:   #161b22;
  --surface-2: #1c232c;
  --border:    #30363d;
  --text:      #c9d1d9;
  --text-dim:  #8b949e;
  --accent:    #3fb950;   /* Schach-/Lichess-Grün */
  --accent-2:  #56d4dd;   /* Cyan für Code/Eval */
  --danger:    #f85149;
  --radius:    10px;
  --maxw:      1080px;
  --mono: ui-monospace, "Cascadia Code", "JetBrains Mono", Consolas, "Courier New", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(63,185,80,0.08), transparent 60%),
    radial-gradient(900px 500px at 10% 0%, rgba(86,212,221,0.06), transparent 55%),
    var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Dezentes Schachbrett-Muster im Hintergrund */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(45deg, rgba(255,255,255,0.012) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.012) 75%),
    linear-gradient(45deg, rgba(255,255,255,0.012) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.012) 75%);
  background-size: 64px 64px;
  background-position: 0 0, 32px 32px;
  pointer-events: none;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- Header / Nav ---------- */
header.site {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(13,17,23,0.78);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex; align-items: center; gap: 18px;
  height: 60px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.1rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand svg { width: 28px; height: 28px; }
.brand b { color: var(--accent); }
.nav .spacer { flex: 1; }
.nav a.link { color: var(--text-dim); font-size: 0.95rem; }
.nav a.link:hover, .nav a.link.active { color: var(--text); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 6px 10px; cursor: pointer; }

/* Basis: horizontale Nav (Desktop). MUSS VOR dem @media stehen, sonst überschreibt
   diese Regel das display:none im @media und das Mobil-Menü bliebe dauerhaft offen. */
.nav .links { display: flex; align-items: center; gap: 18px; }

@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav .links { display: none; position: absolute; top: 60px; left: 0; right: 0;
    flex-direction: column; background: var(--surface); border-bottom: 1px solid var(--border); padding: 10px 20px; gap: 12px; }
  .nav .links.open { display: flex; }
  .nav .spacer { display: none; }
}

/* ---------- Hero ---------- */
.hero { padding: 72px 0 48px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.1; margin: 0 0 16px; }
.hero h1 .grad {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead { font-size: 1.2rem; color: var(--text-dim); max-width: 680px; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0; }
.badge {
  font-family: var(--mono); font-size: 0.8rem; color: var(--accent-2);
  background: var(--surface-2); border: 1px solid var(--border);
  padding: 4px 10px; border-radius: 999px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: 8px; font-weight: 600; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
  transition: transform .08s ease, border-color .15s ease;
}
.btn:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-1px); }
.btn.primary { background: var(--accent); color: #08130b; border-color: var(--accent); }
.btn.primary:hover { filter: brightness(1.08); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }

/* ---------- Cards / Grid ---------- */
.grid { display: grid; gap: 18px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px;
  transition: border-color .15s ease, transform .1s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card h3 { margin: 0 0 8px; font-size: 1.15rem; }
.card p { margin: 0; color: var(--text-dim); }
.card .ico { font-size: 1.6rem; margin-bottom: 6px; }

/* ---------- Sections ---------- */
section { padding: 40px 0; }
section h2 { font-size: 1.7rem; margin: 0 0 6px; }
section .sub { color: var(--text-dim); margin: 0 0 24px; }
.eyebrow { font-family: var(--mono); font-size: 0.8rem; color: var(--accent); text-transform: uppercase; letter-spacing: 0.08em; }

/* ---------- Feature list ---------- */
.features { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.features li { display: flex; gap: 12px; align-items: flex-start; }
.features li .mark { color: var(--accent); font-family: var(--mono); flex: none; }
.features li b { color: var(--text); }

/* ---------- Code / Eval ---------- */
code, .mono { font-family: var(--mono); }
pre.code {
  background: var(--bg-grad); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; overflow-x: auto; font-family: var(--mono); font-size: 0.88rem;
  color: var(--text); line-height: 1.55;
}
pre.code .c { color: var(--text-dim); }
pre.code .k { color: var(--accent-2); }
pre.code .g { color: var(--accent); }

/* ---------- Lichess Live ---------- */
.live-status {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 0.9rem; padding: 6px 12px;
  border: 1px solid var(--border); border-radius: 999px; background: var(--surface-2);
}
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--text-dim); }
.dot.live { background: var(--accent); box-shadow: 0 0 0 0 rgba(63,185,80,0.6); animation: pulse 1.8s infinite; }
.dot.idle { background: var(--text-dim); }
@keyframes pulse { 0%{box-shadow:0 0 0 0 rgba(63,185,80,0.5);} 70%{box-shadow:0 0 0 10px rgba(63,185,80,0);} 100%{box-shadow:0 0 0 0 rgba(63,185,80,0);} }

.embed-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; }
.embed-wrap iframe { width: 100%; height: 500px; border: 0; border-radius: 8px; display: block; }
@media (max-width: 600px) { .embed-wrap iframe { height: 420px; } }

.games-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.games-table th, .games-table td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); }
.games-table th { color: var(--text-dim); font-weight: 600; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.04em; }
.games-table td.mono { font-family: var(--mono); }
.res-win  { color: var(--accent); font-weight: 700; }
.res-loss { color: var(--danger); font-weight: 700; }
.res-draw { color: var(--text-dim); font-weight: 700; }

/* Breite Tabellen auf schmalen Screens: Wrapper scrollt horizontal statt Layout zu sprengen */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
@media (max-width: 600px) {
  .games-table { font-size: 0.82rem; }
  .games-table th, .games-table td { padding: 7px 6px; }
  /* Eröffnung/Opening (5. Spalte) auf schmalen Screens ausblenden, damit die Tabelle passt */
  .games-table th:nth-child(5), .games-table td:nth-child(5) { display: none; }
}

/* ---------- Blog ---------- */
.post-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
.post-list a.post { display: block; }
.post-list .meta { font-family: var(--mono); font-size: 0.8rem; color: var(--text-dim); }
article.prose { max-width: 760px; }
article.prose h1 { font-size: 2.1rem; line-height: 1.15; margin: 0 0 8px; }
article.prose h2 { margin-top: 36px; }
article.prose p, article.prose li { color: var(--text); }
article.prose .meta { font-family: var(--mono); color: var(--text-dim); margin-bottom: 28px; }
article.prose img { max-width: 100%; border-radius: var(--radius); border: 1px solid var(--border); }
article.prose blockquote { border-left: 3px solid var(--accent); margin: 0; padding: 4px 16px; color: var(--text-dim); }

/* ---------- Footer ---------- */
footer.site { border-top: 1px solid var(--border); margin-top: 60px; padding: 32px 0; color: var(--text-dim); font-size: 0.9rem; }
footer.site .cols { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; }
footer.site a { color: var(--text-dim); }
footer.site a:hover { color: var(--text); }
footer.site .legal a { margin-right: 16px; }

hr.sep { border: 0; border-top: 1px solid var(--border); margin: 32px 0; }
.center { text-align: center; }
.muted { color: var(--text-dim); }
.small { font-size: 0.88rem; }
/* Für Screenreader sichtbar, visuell ausgeblendet (semantische Überschriften) */
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}