:root {
  --bxf-base: #0a0418;
  --bxf-magenta: #ff2bd6;
  --bxf-violet: #a855f7;
  --bxf-cyan: #22d3ee;
  --bxf-text: #f0eaf8;
  --bxf-text-dim: #c4b5d4;
  --bxf-text-muted: #7a6894;
  --bxf-bg-card: rgba(18, 6, 42, 0.7);
  --bxf-border: #2a1060;
  --bxf-border-hot: #ff2bd6;
  --bxf-green: #34d399;
  --bxf-red: #f87171;
}

@font-face { font-family: 'Orbitron'; src: url('../fonts/orbitron-400.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Orbitron'; src: url('../fonts/orbitron-600.woff2') format('woff2'); font-weight: 600; font-display: swap; }
@font-face { font-family: 'Orbitron'; src: url('../fonts/orbitron-800.woff2') format('woff2'); font-weight: 800; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('../fonts/inter-400.woff2') format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('../fonts/inter-500.woff2') format('woff2'); font-weight: 500; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('../fonts/inter-600.woff2') format('woff2'); font-weight: 600; font-display: swap; }

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--bxf-base);
  color: var(--bxf-text);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  min-height: 100vh;
}

#bg-canvas { position: fixed; inset: 0; z-index: 0; pointer-events: none; }

h1, h2, h3, .display { font-family: 'Orbitron', 'Inter', sans-serif; }

header.site-header {
  position: relative; z-index: 2;
  display: flex; align-items: center; gap: 12px;
  height: 56px;
  border-bottom: 1px solid var(--bxf-border);
  background: rgba(10, 4, 24, 0.85);
  backdrop-filter: blur(6px);
}
.logo-wrap { height: 56px; display: flex; align-items: center; }
.logo-wrap img { height: 56px; display: block; animation: logoPulse 4s ease-in-out infinite; transition: filter .25s, transform .25s; }
.logo-wrap img:hover { filter: brightness(1.15); transform: scale(1.03); }
@keyframes logoPulse { 0%,100% { filter: drop-shadow(0 0 2px rgba(255,43,214,.35)); } 50% { filter: drop-shadow(0 0 8px rgba(255,43,214,.6)); } }
.wordmark {
  font-family: 'Orbitron', sans-serif; font-weight: 800; font-size: 1.05rem;
  letter-spacing: .06em; color: var(--bxf-text); white-space: nowrap;
  padding-left: 12px;
}
.wordmark .fire { color: var(--bxf-magenta); }
.header-sub { margin-left: auto; padding-right: 16px; color: var(--bxf-text-muted); font-size: .8rem; letter-spacing: .04em; }

main { position: relative; z-index: 1; max-width: 860px; margin: 0 auto; padding: 32px 24px 64px; }
@media (min-width: 700px) { main { padding: 40px 32px 64px; } }

.screen { display: none; }
.screen.active { display: block; animation: fadeUp .25s ease-out; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) {
  .screen.active { animation: none; }
  .logo-wrap img { animation: none; }
}

.card {
  background: var(--bxf-bg-card);
  border: 1px solid var(--bxf-border);
  border-radius: 12px;
  padding: 24px;
  transition: border-color .2s;
}
.card:hover { border-color: rgba(255, 43, 214, .45); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--bxf-magenta); color: #0a0418;
  font-family: 'Inter', sans-serif; font-weight: 600; font-size: 1rem;
  border: none; border-radius: 8px;
  padding: 14px 24px; min-height: 48px;
  cursor: pointer; text-decoration: none;
  transition: box-shadow .2s, transform .1s;
}
.btn:hover { box-shadow: 0 0 18px rgba(255, 43, 214, .55); }
.btn:active { transform: translateY(1px); }
.btn.secondary { background: transparent; color: var(--bxf-text); border: 1px solid var(--bxf-border); }
.btn.secondary:hover { border-color: var(--bxf-border-hot); box-shadow: none; }
.btn.small { padding: 10px 16px; min-height: 42px; font-size: .9rem; }
.btn:disabled { opacity: .4; cursor: not-allowed; box-shadow: none; }

/* Login */
.login-box { max-width: 420px; margin: 8vh auto 0; text-align: center; }
.login-box h1 { font-size: 1.35rem; font-weight: 800; letter-spacing: .05em; margin-bottom: 6px; }
.login-box p { color: var(--bxf-text-dim); margin-bottom: 22px; font-size: .95rem; }
.field { text-align: left; margin-bottom: 14px; }
.field label { display: block; font-size: .8rem; color: var(--bxf-text-muted); letter-spacing: .05em; text-transform: uppercase; margin-bottom: 6px; }
.field input {
  width: 100%; padding: 13px 14px; min-height: 48px;
  background: rgba(10, 4, 24, .8); color: var(--bxf-text);
  border: 1px solid var(--bxf-border); border-radius: 8px;
  font-size: 1rem; font-family: 'Inter', sans-serif;
}
.field input:focus { outline: none; border-color: var(--bxf-magenta); box-shadow: 0 0 0 2px rgba(255,43,214,.2); }
.login-error { color: var(--bxf-red); font-size: .88rem; min-height: 1.3em; margin: 8px 0 12px; }

/* Pickers */
.picker-title { font-size: 1.15rem; font-weight: 600; letter-spacing: .04em; margin: 4px 0 4px; }
.picker-sub { color: var(--bxf-text-muted); font-size: .88rem; margin-bottom: 18px; }
.lesson-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 640px) { .lesson-grid { grid-template-columns: 1fr 1fr; } }
.lesson-card { cursor: pointer; text-align: left; width: 100%; font-family: inherit; color: inherit; }
.lesson-card .code { font-family: 'Orbitron', sans-serif; font-weight: 600; font-size: .82rem; color: var(--bxf-cyan); letter-spacing: .08em; }
.lesson-card .name { font-weight: 600; font-size: 1.02rem; margin: 4px 0 6px; }
.lesson-card .meta { color: var(--bxf-text-muted); font-size: .82rem; }

.choice-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 6px; }
.choice-row .btn { flex: 1 1 140px; }

.crumb { color: var(--bxf-text-muted); font-size: .85rem; margin-bottom: 16px; }
.crumb button { background: none; border: none; color: var(--bxf-violet); cursor: pointer; font: inherit; padding: 4px; }
.crumb button:hover { color: var(--bxf-magenta); }

/* Study session */
.session-bar { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.session-bar .info { font-size: .85rem; color: var(--bxf-text-dim); }
.session-bar .info .hl { color: var(--bxf-cyan); font-weight: 600; }
.progress-track { height: 6px; background: rgba(42,16,96,.6); border-radius: 3px; overflow: hidden; margin-bottom: 20px; }
.progress-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--bxf-magenta), var(--bxf-violet)); transition: width .25s; }

.qcard { min-height: 260px; display: flex; flex-direction: column; }
.qtag { font-size: .74rem; letter-spacing: .08em; text-transform: uppercase; color: var(--bxf-text-muted); margin-bottom: 12px; display: flex; gap: 10px; align-items: center; }
.qtag .pill { border: 1px solid var(--bxf-border); border-radius: 999px; padding: 2px 10px; }
.qtag .pill.hot { border-color: var(--bxf-magenta); color: var(--bxf-magenta); }
.qtext { font-size: 1.12rem; font-weight: 500; margin-bottom: 18px; }

/* Flashcard */
.flashcard { cursor: pointer; user-select: none; }
.flash-face { font-size: 1.1rem; }
.flash-face.answer { color: var(--bxf-cyan); font-weight: 500; }
.flash-hint { margin-top: auto; padding-top: 18px; color: var(--bxf-text-muted); font-size: .82rem; }

/* MC options */
.opt-list { display: grid; gap: 10px; }
.opt {
  text-align: left; width: 100%; cursor: pointer;
  background: rgba(10, 4, 24, .6); color: var(--bxf-text);
  border: 1px solid var(--bxf-border); border-radius: 8px;
  padding: 14px 16px; min-height: 50px; font-size: .98rem; font-family: inherit;
  transition: border-color .15s, background .15s;
}
.opt:hover:not(:disabled) { border-color: var(--bxf-violet); }
.opt.correct { border-color: var(--bxf-green); background: rgba(52, 211, 153, .12); }
.opt.wrong { border-color: var(--bxf-red); background: rgba(248, 113, 113, .12); }
.opt:disabled { cursor: default; }

/* FIB */
.fib-input { display: flex; gap: 10px; flex-wrap: wrap; }
.fib-input input {
  flex: 1 1 220px; padding: 13px 14px; min-height: 48px;
  background: rgba(10, 4, 24, .8); color: var(--bxf-text);
  border: 1px solid var(--bxf-border); border-radius: 8px; font-size: 1rem; font-family: inherit;
}
.fib-input input:focus { outline: none; border-color: var(--bxf-magenta); }
.feedback { margin-top: 14px; font-size: .95rem; min-height: 1.4em; }
.feedback.good { color: var(--bxf-green); }
.feedback.bad { color: var(--bxf-red); }

.nav-row { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }
.nav-row .spacer { flex: 1; }

/* Results */
.results { text-align: center; padding: 40px 24px; }
.results .score { font-family: 'Orbitron', sans-serif; font-weight: 800; font-size: 2.6rem; color: var(--bxf-magenta); }
.results .detail { color: var(--bxf-text-dim); margin: 10px 0 24px; }

footer.site-footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--bxf-border);
  padding: 28px 24px; text-align: center;
  color: var(--bxf-text-muted); font-size: .82rem;
}
footer.site-footer a { color: var(--bxf-violet); text-decoration: none; }
footer.site-footer a:hover { color: var(--bxf-magenta); }

/* ---------- Jeopardy ---------- */
main.wide { max-width: 1080px; }
#jeopardy-board { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.j-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.j-cell { border-radius: 8px; }
.j-cat {
  background: rgba(18, 6, 42, 0.9); border: 1px solid var(--bxf-border);
  color: var(--bxf-cyan); font-family: 'Orbitron', sans-serif; font-weight: 600;
  font-size: clamp(.58rem, 1.4vw, .82rem); letter-spacing: .04em; text-transform: uppercase;
  display: flex; align-items: center; justify-content: center; text-align: center;
  padding: 10px 6px; min-height: 64px;
}
.j-tile {
  background: rgba(18, 6, 42, 0.7); border: 1px solid var(--bxf-border);
  color: var(--bxf-magenta); font-family: 'Orbitron', sans-serif; font-weight: 800;
  font-size: clamp(1rem, 2.6vw, 1.6rem); cursor: pointer;
  min-height: 62px; transition: border-color .15s, box-shadow .15s;
}
.j-tile:hover:not(:disabled) { border-color: var(--bxf-magenta); box-shadow: 0 0 12px rgba(255,43,214,.35); }
.j-tile:disabled { color: transparent; cursor: default; opacity: .35; }
.score-bar { display: flex; flex-wrap: wrap; gap: 10px; }
.score-chip {
  background: var(--bxf-bg-card); border: 1px solid var(--bxf-border); border-radius: 8px;
  padding: 10px 16px; display: flex; align-items: center; gap: 12px;
}
.score-chip .tname { color: var(--bxf-text-dim); font-size: .9rem; font-weight: 600; }
.score-chip .tscore { font-family: 'Orbitron', sans-serif; font-weight: 800; color: var(--bxf-cyan); font-size: 1.1rem; }
.score-chip .tscore.neg { color: var(--bxf-red); }
.clue-card { max-width: 760px; margin: 0 auto; min-height: 300px; }
.clue-text { font-size: clamp(1.15rem, 2.4vw, 1.5rem); font-weight: 500; line-height: 1.5; margin-top: 6px; }
.clue-response { margin-top: 18px; font-size: clamp(1.05rem, 2vw, 1.3rem); color: var(--bxf-cyan); font-weight: 600; }
.dd-banner {
  display: inline-block; font-family: 'Orbitron', sans-serif; font-weight: 800;
  font-size: clamp(1.4rem, 3vw, 2rem); color: var(--bxf-magenta);
  text-shadow: 0 0 18px rgba(255,43,214,.6); letter-spacing: .1em;
}
.award-grid { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.award-team {
  display: flex; align-items: center; gap: 10px;
  background: rgba(10,4,24,.5); border: 1px solid var(--bxf-border); border-radius: 8px; padding: 10px 12px;
}
.award-team .tname { flex: 1; font-weight: 600; font-size: .92rem; }
.wager-box { max-width: 460px; }
.wager-box input[type="number"] {
  width: 100%; padding: 12px 14px; background: rgba(10,4,24,.8); color: var(--bxf-text);
  border: 1px solid var(--bxf-border); border-radius: 8px; font-size: 1rem; font-family: inherit;
}