:root {
  --bg: #0d1117;
  --bg-deep: #010409;
  --panel: #161b22;
  --panel-2: #1c2330;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --green: #3fb950;
  --blue: #58a6ff;
  --purple: #a371f7;
  --gold: #e3b341;
  --red: #f85149;
  --pixel: "Press Start 2P", ui-monospace, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
  --radius: 10px;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background:
    radial-gradient(circle at 20% -10%, #1f2d4a55 0, transparent 45%),
    radial-gradient(circle at 110% 20%, #3b1f4a44 0, transparent 40%),
    var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
button { font: inherit; color: inherit; cursor: pointer; }
code { font-family: var(--mono); font-size: .88em; background: #6e768166; padding: .1em .4em; border-radius: 5px; }
a { color: var(--blue); }

/* ── HUD ───────────────────────────────────────── */
.hud {
  position: sticky; top: 0; z-index: 10;
  display: grid; grid-template-columns: auto 1fr auto; gap: 20px; align-items: center;
  padding: 12px 24px;
  background: color-mix(in srgb, var(--bg-deep) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.brand {
  background: none; border: 0; padding: 0;
  font: 14px/1.3 var(--pixel); color: var(--green); text-align: left;
}
.brand span { display: block; color: var(--text); font-size: 10px; letter-spacing: 4px; margin-top: 4px; }
.hud-level { max-width: 520px; width: 100%; justify-self: center; }
.hud-row { display: flex; align-items: baseline; gap: 10px; }
.lvl { font: 10px var(--pixel); color: var(--gold); }
.lvl-name { font-weight: 700; }
.xp-num { margin-left: auto; font: 10px var(--pixel); color: var(--muted); }
.bar { height: 10px; background: var(--panel-2); border: 1px solid var(--border); border-radius: 99px; overflow: hidden; margin-top: 6px; }
.bar-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--green), #7ee787); border-radius: 99px; transition: width .6s cubic-bezier(.2,.8,.2,1); }
.hud-next { font-size: 12px; color: var(--muted); margin-top: 3px; }
.hud-stats { display: flex; gap: 8px; }
.hud-stats > * {
  font: 11px var(--pixel); padding: 8px 10px; border-radius: 8px;
  background: var(--panel); border: 1px solid var(--border);
}

/* ── Layout ───────────────────────────────────── */
main { flex: 1; width: 100%; max-width: 1100px; margin: 0 auto; padding: 28px 24px 40px; }
h1, h2, h3 { line-height: 1.25; }
.pixel-title { font: 16px/1.5 var(--pixel); margin: 0 0 6px; }
.sub { color: var(--muted); margin: 0 0 24px; }

/* ── Map ──────────────────────────────────────── */
.map-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.world-card {
  position: relative; text-align: left;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 18px 16px; overflow: hidden;
  transition: transform .15s ease, border-color .15s ease;
}
.world-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: var(--wc); }
.world-card:hover { transform: translateY(-2px); border-color: var(--wc); }
.world-card .num { font: 9px var(--pixel); color: var(--wc); }
.world-card h3 { margin: 6px 0 2px; font-size: 18px; display: flex; gap: 8px; align-items: center; }
.world-card .dom { font-size: 13px; color: var(--muted); margin: 0 0 12px; }
.world-card .crown { position: absolute; top: 14px; right: 14px; font-size: 22px; }
.meter { display: grid; grid-template-columns: 74px 1fr 42px; gap: 8px; align-items: center; font-size: 12px; color: var(--muted); margin-top: 6px; }
.meter .bar { height: 6px; margin: 0; }
.meter .bar-fill { background: var(--wc); }
.chip { display: inline-block; font: 9px var(--pixel); padding: 5px 7px; border-radius: 6px; background: var(--panel-2); border: 1px solid var(--border); color: var(--muted); }

.special-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
.special {
  text-align: left; background: var(--panel); border: 1px dashed var(--border); border-radius: var(--radius); padding: 18px;
}
.special h3 { margin: 0 0 4px; }
.special p { margin: 0; color: var(--muted); font-size: 14px; }
.special.final { border-style: solid; border-color: #e3b34155; background: linear-gradient(135deg, #2a2112, var(--panel)); }

/* ── World ────────────────────────────────────── */
.back { background: none; border: 0; color: var(--muted); padding: 0; margin-bottom: 14px; font-size: 14px; }
.back:hover { color: var(--text); }
.world-head { display: flex; gap: 16px; align-items: center; margin-bottom: 20px; }
.world-head .big-icon { font-size: 42px; }
.world-head h2 { margin: 0; }
.world-head p { margin: 2px 0 0; color: var(--muted); font-size: 14px; }

.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--border); margin-bottom: 22px; flex-wrap: wrap; }
.tab {
  background: none; border: 0; border-bottom: 2px solid transparent;
  padding: 10px 14px; color: var(--muted); font-weight: 600; margin-bottom: -1px;
}
.tab[aria-selected="true"] { color: var(--text); border-color: var(--wc, var(--green)); }

.reader { display: grid; grid-template-columns: 220px 1fr; gap: 24px; }
.toc { display: flex; flex-direction: column; gap: 4px; }
.toc button {
  text-align: left; background: none; border: 1px solid transparent; border-radius: 8px;
  padding: 8px 10px; color: var(--muted); font-size: 14px; display: flex; gap: 8px;
}
.toc button[aria-current="true"] { background: var(--panel); border-color: var(--border); color: var(--text); }
.toc .tick { width: 16px; flex: none; }
.page { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 30px; }
.page h3 { margin-top: 0; font-size: 22px; }
.page li { margin: 4px 0; }
.page table { border-collapse: collapse; width: 100%; margin: 12px 0; font-size: 14px; }
.page th, .page td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top; }
.page th { background: var(--panel-2); }
.page-nav { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--border); flex-wrap: wrap; }

/* ── Buttons ──────────────────────────────────── */
.btn {
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text);
  padding: 10px 16px; border-radius: 8px; font-weight: 600;
}
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--green); border-color: var(--green); color: #04130a; }
.btn.primary:hover { filter: brightness(1.1); }
.btn.boss { background: var(--red); border-color: var(--red); color: #fff; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ── Battle start ─────────────────────────────── */
.arena-intro { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.mode-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.mode-card h3 { margin: 0 0 6px; }
.mode-card p { color: var(--muted); font-size: 14px; margin: 0 0 14px; }
.mode-card.boss-card { border-color: #f8514966; background: linear-gradient(160deg, #2b1416, var(--panel) 60%); }

/* ── Quiz ─────────────────────────────────────── */
.quiz { max-width: 760px; margin: 0 auto; }
.quiz-top { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
.pips { display: flex; gap: 5px; margin-left: auto; }
.pip { width: 18px; height: 8px; border-radius: 3px; background: var(--panel-2); border: 1px solid var(--border); }
.pip.ok { background: var(--green); border-color: var(--green); }
.pip.bad { background: var(--red); border-color: var(--red); }
.pip.now { border-color: var(--text); }
.pip.done { background: var(--muted); border-color: var(--muted); }
.question { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.question h3 { margin: 0 0 18px; font-size: 20px; font-weight: 600; }
.opts { display: grid; gap: 10px; }
.opt {
  display: flex; gap: 12px; align-items: flex-start; text-align: left;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px;
  transition: border-color .12s ease, background .12s ease;
}
.opt:hover:not(:disabled) { border-color: var(--blue); }
.opt .key { font: 10px var(--pixel); color: var(--muted); padding-top: 4px; width: 16px; flex: none; }
.opt.correct { border-color: var(--green); background: #12351c; }
.opt.wrong { border-color: var(--red); background: #3a1416; }
.opt.chosen { border-color: var(--blue); }
.opt:disabled { cursor: default; }
.feedback { margin-top: 16px; padding: 14px 16px; border-radius: 8px; border: 1px solid; }
.feedback.ok { border-color: #3fb95066; background: #12351c88; }
.feedback.bad { border-color: #f8514966; background: #3a141688; }
.feedback strong { display: block; margin-bottom: 2px; }
.quiz-actions { display: flex; justify-content: flex-end; margin-top: 16px; gap: 10px; }
.hint { font-size: 12px; color: var(--muted); text-align: right; margin-top: 8px; }

.shake { animation: shake .35s; }
@keyframes shake { 20%,60% { transform: translateX(-6px); } 40%,80% { transform: translateX(6px); } }

/* ── Results ──────────────────────────────────── */
.result { max-width: 760px; margin: 0 auto; text-align: center; }
.result .big { font-size: 64px; line-height: 1; }
.result .score { font: 22px var(--pixel); margin: 14px 0 6px; }
.result .xp-gain { font: 12px var(--pixel); color: var(--green); }
.review-list { text-align: left; margin-top: 24px; display: grid; gap: 10px; }
.review-item { background: var(--panel); border: 1px solid var(--border); border-left: 3px solid var(--red); border-radius: 8px; padding: 12px 14px; font-size: 14px; }
.review-item .ans { color: var(--green); margin-top: 4px; }
.review-item .why { color: var(--muted); margin-top: 2px; }
.result .quiz-actions { justify-content: center; }

/* ── Missions ─────────────────────────────────── */
.missions { display: grid; gap: 10px; max-width: 760px; }
.mission {
  display: flex; gap: 14px; align-items: center; background: var(--panel); border: 1px solid var(--border);
  border-radius: 8px; padding: 14px 16px; cursor: pointer;
}
.mission input { width: 20px; height: 20px; accent-color: var(--green); flex: none; }
.mission.done span { text-decoration: line-through; color: var(--muted); }
.mission .xp { margin-left: auto; font: 9px var(--pixel); color: var(--gold); flex: none; }

/* ── Grave ────────────────────────────────────── */
.grave-list { display: grid; gap: 10px; margin-top: 18px; }
.grave-item { display: grid; grid-template-columns: 1fr auto; gap: 12px; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 12px 16px; font-size: 14px; }
.grave-item .meta { color: var(--muted); font-size: 12px; }
.stage { display: flex; gap: 4px; align-items: center; }
.stage i { width: 12px; height: 12px; border-radius: 3px; background: var(--panel-2); border: 1px solid var(--border); }
.stage i.on { background: var(--purple); border-color: var(--purple); }
.empty { text-align: center; color: var(--muted); padding: 40px 0; }

/* ── Final ────────────────────────────────────── */
.checklist { list-style: none; padding: 0; display: grid; gap: 8px; }
.checklist li { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 12px 16px; display: flex; gap: 10px; }
.score-form { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.score-form input { background: var(--panel-2); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 10px 12px; width: 120px; font: inherit; }

/* ── Toast & modal ────────────────────────────── */
#toast-layer { position: fixed; right: 20px; bottom: 20px; display: grid; gap: 8px; z-index: 50; }
.toast {
  font: 11px var(--pixel); background: var(--panel); border: 1px solid var(--green); color: var(--green);
  padding: 12px 14px; border-radius: 8px; animation: pop 2.4s ease forwards;
}
@keyframes pop { 0% { opacity: 0; transform: translateY(12px); } 10%, 80% { opacity: 1; transform: none; } 100% { opacity: 0; transform: translateY(-8px); } }
.modal { position: fixed; inset: 0; background: #010409cc; display: grid; place-items: center; z-index: 60; padding: 16px; }
.modal[hidden] { display: none; }
.modal-box { background: var(--panel); border: 1px solid var(--gold); border-radius: 14px; padding: 32px; text-align: center; max-width: 420px; animation: rise .4s cubic-bezier(.2,.8,.2,1); }
.modal-box .big { font-size: 56px; }
.modal-box h2 { font: 16px/1.5 var(--pixel); color: var(--gold); }
@keyframes rise { from { transform: scale(.85); opacity: 0; } to { transform: none; opacity: 1; } }

/* ── Footer ───────────────────────────────────── */
.foot { display: flex; gap: 14px; align-items: center; justify-content: center; flex-wrap: wrap; padding: 16px; border-top: 1px solid var(--border); font-size: 13px; color: var(--muted); }
.foot button, .file-btn { background: none; border: 0; color: var(--muted); text-decoration: underline; cursor: pointer; padding: 0; }
.foot .danger-link:hover { color: var(--red); }
.foot-src { opacity: .7; }

@media (max-width: 760px) {
  .hud { grid-template-columns: 1fr auto; padding: 10px 16px; gap: 10px; }
  .hud-level { grid-column: 1 / -1; grid-row: 2; }
  main { padding: 20px 16px 32px; }
  .reader { grid-template-columns: 1fr; }
  .toc { flex-direction: row; overflow-x: auto; }
  .toc button { white-space: nowrap; }
  .page { padding: 20px; }
  .special-row { grid-template-columns: 1fr; }
  .map-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }