/* CodeLogic — global styles */
:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #273449;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --primary: #38bdf8;
  --primary-2: #0ea5e9;
  --accent: #a78bfa;
  --success: #22c55e;
  --danger: #ef4444;
  --warn: #f59e0b;
  --border: #334155;
  --radius: 10px;
  --shadow: 0 6px 24px rgba(0,0,0,.25);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif;
  background: radial-gradient(1200px 800px at 10% -10%, #172554 0%, transparent 60%),
              radial-gradient(1200px 800px at 90% 110%, #4c1d95 0%, transparent 60%),
              var(--bg);
  color: var(--text);
  min-height: 100vh;
}

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

.container { max-width: 1200px; margin: 0 auto; padding: 24px; }
.center { display: grid; place-items: center; min-height: 100vh; }

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

.card-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 8px 0;
}
.card-sub { color: var(--muted); margin: 0 0 16px 0; font-size: .9rem; }

.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
}

.row { display: flex; gap: 12px; align-items: center; }
.row.wrap { flex-wrap: wrap; }
.spacer { flex: 1; }

.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; letter-spacing: .5px;
}
.brand-logo {
  width: 34px; height: 34px; border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: grid; place-items: center; color: #0b1220; font-weight: 900;
}

.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
label { font-size: .85rem; color: var(--muted); }
input, select, textarea {
  background: #0b1220; color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 12px; font-size: 1rem;
  outline: none; transition: border-color .15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); }
input[type="file"] { padding: 6px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--primary); color: #0b1220;
  border: none; border-radius: 8px;
  padding: 10px 16px; font-size: 1rem; font-weight: 600;
  cursor: pointer; transition: transform .05s, background .15s;
}
.btn:hover { background: var(--primary-2); }
.btn:active { transform: translateY(1px); }
.btn.secondary { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); }
.btn.secondary:hover { background: #334155; }
.btn.danger { background: var(--danger); color: white; }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn.small { padding: 6px 10px; font-size: .85rem; }

.nav {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 24px; border-bottom: 1px solid var(--border);
  background: rgba(15,23,42,.65); backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 20;
}
.nav .tabs { display: flex; gap: 8px; margin-left: 16px; }
.tab {
  padding: 6px 10px; border-radius: 8px;
  color: var(--muted); cursor: pointer; user-select: none;
}
.tab.active { background: var(--panel-2); color: var(--text); }

.stat {
  background: linear-gradient(135deg, #1e293b, #273449);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.stat .label { color: var(--muted); font-size: .85rem; }
.stat .value { font-size: 2rem; font-weight: 700; margin-top: 6px; }
.stat .accent { color: var(--primary); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: .95rem; }
th { color: var(--muted); font-weight: 600; }
tr:hover td { background: rgba(56,189,248,.04); }

.badge {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  font-size: .75rem; font-weight: 600;
}
.badge.joined { background: rgba(34,197,94,.15); color: #86efac; }
.badge.pending { background: rgba(245,158,11,.15); color: #fcd34d; }
.badge.cs { background: rgba(56,189,248,.15); color: #7dd3fc; }
.badge.nocs { background: rgba(167,139,250,.15); color: #c4b5fd; }

.hidden { display: none !important; }

#toast-host {
  position: fixed; right: 20px; bottom: 20px;
  display: flex; flex-direction: column; gap: 8px; z-index: 999;
}
.toast {
  background: var(--panel); border: 1px solid var(--border);
  padding: 10px 14px; border-radius: 8px;
  opacity: 0; transform: translateY(6px); transition: all .2s ease;
  min-width: 240px;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast-error { border-color: var(--danger); }
.toast-success { border-color: var(--success); }
.toast-info { border-color: var(--primary); }

/* Login page */
.login-card { width: min(420px, 92vw); }
.login-title {
  font-size: 1.6rem; font-weight: 800; margin: 0 0 4px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.login-sub { color: var(--muted); margin-bottom: 20px; }
.pin-input { letter-spacing: 6px; text-align: center; font-size: 1.25rem; }

/* Presentation screen */
.presentation-body { background: #050914; }
.presentation-wrap {
  padding: 32px; min-height: 100vh;
  display: grid; grid-template-rows: auto 1fr; gap: 24px;
}
.presentation-header {
  display: flex; align-items: center; justify-content: space-between;
}
.presentation-title {
  font-size: 2rem; font-weight: 800; margin: 0;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.big-stat .value { font-size: 3.5rem; }
.leaderboard-row {
  display: grid; grid-template-columns: 40px 1fr auto;
  padding: 8px 12px; border-bottom: 1px solid var(--border);
  align-items: center;
}
.rank { font-weight: 800; color: var(--muted); }
.rank.top { color: var(--primary); }

/* Robot widget */
.robot-wrap { }
.robot-grid {
  display: grid; grid-template-columns: repeat(var(--cols, 5), 1fr);
  gap: 6px; max-width: 380px; margin: 4px auto 4px;
}
.robot-cell {
  aspect-ratio: 1 / 1;
  background: rgba(15,23,42,.9);
  border: 1px solid var(--border);
  border-radius: 6px;
  display: grid; place-items: center;
  font-size: 1.35rem;
  position: relative;
  transition: outline-color .15s;
}
.robot-cell.empty {
  background: transparent; border-color: transparent;
}
.robot-cell.obstacle { background: rgba(148,163,184,.15); }
.robot-cell.robot-here { outline: 2px solid var(--primary); background: rgba(56,189,248,.14); }
.robot-cell .robot-marker {
  position: absolute; color: var(--primary);
  font-size: 1.5rem; text-shadow: 0 2px 6px rgba(0,0,0,.6);
  pointer-events: none;
}
.robot-cell.collected { opacity: .45; }
.robot-cell.crash { animation: robot-crash .35s 3; background: rgba(239,68,68,.25); }
@keyframes robot-crash {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-3px); }
  75% { transform: translateX(3px); }
}
.robot-strip {
  min-height: 44px; padding: 8px 12px;
  background: var(--panel-2); border-radius: 8px;
  margin-top: 10px;
  display: flex; flex-wrap: wrap; gap: 6px;
  align-items: center;
  color: var(--muted); font-size: .9rem;
}
.robot-strip.has-content { color: var(--text); }
.robot-chip {
  background: rgba(56,189,248,.15); color: var(--primary);
  padding: 3px 10px; border-radius: 999px;
  font-size: .78rem; font-weight: 600;
}
.robot-cmd { padding: 12px; font-size: 1rem; font-weight: 700; text-align: center; }
.robot-hint {
  margin-top: 10px; padding: 8px 12px;
  background: rgba(56,189,248,.08); border: 1px solid rgba(56,189,248,.2);
  border-radius: 8px; color: var(--muted); font-size: .88rem;
  text-align: center;
}