/* Homepage styling only (static hosting friendly).
   Styled to match the vibe of `Titration Simulator (1).html` (dark lab panels + mono labels). */

:root{
  --bg: #0a0d10;
  --panel: #10151a;
  --panel-2: #0d1216;
  --border: #1e2a33;
  --border-2: #2a3a45;
  --text: #e5e7eb;
  --text-dim: #8a98a5;
  --text-faint: #56636e;
  --cyan: #4dd0e1;
  --amber: #f5a524;
  --magenta: #e879f9;
  --lime: #a3e635;
  --radius: 16px;
  --shadow: 0 6px 26px rgba(0,0,0,0.35);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(77,208,225,0.05), transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(232,121,249,0.04), transparent 50%);
}

a{ color:inherit; text-decoration:none; }

.wrap{
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 18px 42px;
}

.topbar{
  display:flex;
  align-items:center;
  gap: 18px;
  padding: 10px 0 10px;
  margin-top: 10px;
  border-bottom: 1px solid var(--border);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
}
.brand{
  color: var(--cyan);
  font-weight: 800;
  letter-spacing: 0.10em;
  font-size: 12px;
  display:flex;
  align-items:center;
  gap: 8px;
}
.live-dot{
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--lime);
  box-shadow: 0 0 8px rgba(163,230,53,0.7);
  display:inline-block;
}
.stat{ color: var(--text-dim); }
.stat b{ color: var(--text); font-weight: 600; letter-spacing: 0.02em; }
.spacer{ flex: 1; }

.hero{
  padding: 18px 0 0;
}
.hero h1{
  margin: 10px 0 8px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.2px;
}
.hero p{
  margin: 0 0 8px;
  color: var(--text-dim);
  line-height: 1.4;
  font-size: 13px;
  max-width: 78ch;
}
.back-link{
  display:inline-block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-top: 14px;
}
.back-link:hover{ color: var(--cyan); }

.grid{
  display:grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 10px;
  padding: 12px 0 0;
}

.card{
  grid-column: span 6;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: var(--radius);
  overflow:hidden;
  box-shadow: var(--shadow);
  transition: transform 140ms ease, border-color 140ms ease;
  min-height: 156px;
}
.card-course{
  grid-column: span 4;
  min-height: 188px;
}
.card:hover{
  transform: translateY(-2px);
  border-color: rgba(77,208,225,0.40);
}

.panel-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(to bottom, #141b21, #10151a);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  text-transform: uppercase;
}
.panel-head .title{
  color: var(--cyan);
  font-weight: 700;
  letter-spacing: 0.12em;
}
.panel-head .title::before{
  content: '▸';
  margin-right: 6px;
  color: rgba(77,208,225,0.55);
}
.panel-head .meta{ color: var(--text-faint); font-size: 10px; }

.panel-body{
  padding: 12px;
  display:flex;
  flex-direction:column;
  gap: 10px;
}

.sim-name{
  font-size: 15px;
  font-weight: 650;
  letter-spacing: 0.2px;
}
.sim-desc{
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1.35;
  flex: 1;
}

.meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap: 8px;
  color: var(--text-faint);
  font-size: 11px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  letter-spacing: 0.04em;
}
.meta code{
  font-family: inherit;
  font-size: 11px;
  color: var(--text-dim);
  background: var(--panel-2);
  border: 1px solid var(--border-2);
  padding: 2px 8px;
  border-radius: 999px;
}

.actions{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid var(--border-2);
  background: rgba(0,0,0,0.12);
  color: var(--text);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.10em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  text-transform: uppercase;
}
.btn:hover{ border-color: rgba(77,208,225,0.55); color: var(--cyan); }
.tag{
  display:inline-flex;
  align-items:center;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border-2);
  background: var(--panel-2);
  color: var(--text-dim);
  font-size: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  letter-spacing: 0.10em;
  text-transform: uppercase;
}
.tag.cyan{ color: rgba(77,208,225,0.95); border-color: rgba(77,208,225,0.28); }
.tag.amber{ color: rgba(245,165,36,0.95); border-color: rgba(245,165,36,0.28); }
.tag.magenta{ color: rgba(232,121,249,0.95); border-color: rgba(232,121,249,0.28); }
.tag.lime{ color: rgba(163,230,53,0.95); border-color: rgba(163,230,53,0.28); }

.note{
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 12px;
  line-height: 1.35;
}
.note a{ color: var(--cyan); }

@media (max-width: 860px){
  .card, .card-course{ grid-column: span 12; }
  .topbar{ flex-wrap: wrap; gap: 10px; }
  .spacer{ display:none; }
}