:root{
  --bg:#0f1722; --panel:#16212e; --panel2:#1d2a3a; --line:#2a3a4d;
  --ink:#e8eef5; --muted:#9fb1c4; --accent:#ff9f33; --accent2:#ffc06a;
  --green:#34d27b; --red:#ff6b6b; --kw:#ffd479;
  --dom:#ff9f33;                 /* per-question domain color, set by JS */
  --radius:16px; --tap:50px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  background:radial-gradient(1200px 600px at 50% -10%, #15243400, var(--bg)), var(--bg);
  color:var(--ink);
  font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  overscroll-behavior-y:contain;
}
#app{max-width:720px;margin:0 auto;padding:16px 16px 104px}
h1,h2,h3{line-height:1.25;margin:0 0 .4em}
.mini-h{font-size:15px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.muted{color:var(--muted)} .tiny{font-size:12.5px} .center{text-align:center} .hidden{display:none!important}
a{color:var(--accent2)}

/* Header */
.brand{display:flex;align-items:center;gap:11px;margin:6px 0 16px}
.brand .logo{font-size:28px}
.brand h1{font-size:19px;margin:0}
.brand .sub{font-size:12px;color:var(--muted)}

/* Home top chips */
.home-top{display:flex;gap:10px;margin-bottom:12px}
.chip{flex:1;text-align:center;background:var(--panel2);border:1px solid var(--line);border-radius:999px;padding:9px;font-weight:700;font-size:13.5px}
.chip.streak{background:linear-gradient(90deg,#3a2410,#2a1d0e);border-color:#ff9f3355;color:var(--accent2)}

/* Cards */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:14px}
.exam-card,.review-card{display:flex;align-items:center;justify-content:space-between;gap:12px;cursor:pointer;transition:.15s}
.exam-card:active,.review-card.due:active{transform:scale(.99)}
.exam-card .meta,.review-card .meta{flex:1;min-width:0}
.exam-card h3,.review-card h3{margin:0 0 4px;font-size:16px}
.exam-card .desc,.review-card .desc{font-size:13px;color:var(--muted)}
.review-card{border-style:dashed}
.review-card.due{border:1px solid var(--green);background:linear-gradient(90deg,#10271b,#16212e)}

.badge{font-size:12px;font-weight:800;padding:4px 11px;border-radius:999px;white-space:nowrap;min-width:34px;text-align:center}
.badge.pass{background:#143a28;color:#8af0b4;border:1px solid #34d27b55}
.badge.fail{background:#3a1c1c;color:#ff9a9a;border:1px solid #ff6b6b44}
.badge.none{background:#26323f;color:var(--muted);border:1px solid var(--line)}
.badge.due{background:var(--green);color:#062012;border:1px solid var(--green)}

/* Mastery */
.mastery .dom-row,.card .dom-row{margin:11px 0}
.dom-row .lab{display:flex;justify-content:space-between;font-size:13px;margin-bottom:5px}
.bar{height:9px;background:var(--panel2);border-radius:999px;overflow:hidden}
.bar > i{display:block;height:100%;border-radius:999px;transition:width .4s}

/* Mode toggle */
.seg{display:flex;background:var(--panel2);border:1px solid var(--line);border-radius:999px;padding:4px;margin:2px 0 12px}
.seg button{flex:1;border:0;background:transparent;color:var(--muted);padding:11px;border-radius:999px;font-weight:800;font-size:14px;cursor:pointer}
.seg button.on{background:var(--accent);color:#1a1205}

/* Buttons */
.btn{display:block;width:100%;min-height:var(--tap);border:0;border-radius:13px;font-size:16px;font-weight:800;padding:14px;cursor:pointer;background:var(--accent);color:#1a1205;margin-top:10px}
.btn:active{filter:brightness(.95)}
.btn.secondary{background:var(--panel2);color:var(--ink);border:1px solid var(--line)}
.btn.ghost{background:transparent;color:var(--accent2);border:1px solid var(--line)}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.btn.xbtn{width:auto;margin:0;padding:7px 14px;min-height:0;font-size:14px}

/* Quiz header */
.qhead{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.qhead .left{font-size:13px;color:var(--muted);font-weight:800}
.timer{font-variant-numeric:tabular-nums;font-weight:800;font-size:15px;background:var(--panel2);border:1px solid var(--line);padding:7px 11px;border-radius:10px}
.timer.warn{color:var(--accent2);border-color:var(--accent)}
.timer.danger{color:#fff;background:#5a1d1d;border-color:var(--red)}
.progress{height:7px;background:var(--panel2);border-radius:999px;overflow:hidden;margin-bottom:16px}
.progress > i{display:block;height:100%;width:0;transition:width .25s}

.qtag{display:inline-block;font-size:11.5px;font-weight:800;background:var(--panel2);border:1.5px solid var(--line);border-radius:999px;padding:4px 11px;margin-bottom:12px}
.qtext{font-size:19px;font-weight:650;line-height:1.4;margin-bottom:8px}
.qhint{font-size:13px;color:var(--accent2);font-weight:700;margin-bottom:14px}
mark.kw{background:linear-gradient(transparent 55%, #ffd47955 55%);color:var(--kw);font-weight:800;padding:0 2px;border-radius:3px}

/* Options (answering) */
.opt{display:flex;align-items:flex-start;gap:12px;width:100%;text-align:left;background:var(--panel);border:1.5px solid var(--line);border-radius:13px;padding:15px;margin-bottom:11px;color:var(--ink);font-size:16px;cursor:pointer;transition:.12s}
.opt:active{transform:scale(.995)}
.opt .key{flex:none;width:28px;height:28px;border-radius:8px;background:var(--panel2);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px}
.opt.sel{border-color:var(--dom);background:color-mix(in srgb, var(--dom) 12%, var(--panel))}
.opt.sel .key{background:var(--dom);color:#0c1116;border-color:var(--dom)}

/* Reveal */
.verdict{font-weight:900;font-size:18px;margin:2px 0 12px}
.verdict.ok{color:var(--green)} .verdict.no{color:var(--red)}

.hook-card{display:flex;gap:14px;align-items:flex-start;background:linear-gradient(135deg,#11301f,#13251c);border:1.5px solid var(--green);border-radius:16px;padding:15px;margin-bottom:12px;box-shadow:0 6px 22px #34d27b1f}
.hook-emoji{font-size:34px;line-height:1;flex:none}
.hook-body{flex:1;min-width:0}
.hook-title{display:flex;align-items:center;gap:9px;font-weight:800;font-size:16px;margin-bottom:6px}
.hook-title .key.ok{flex:none;width:26px;height:26px;border-radius:7px;background:var(--green);color:#062012;display:flex;align-items:center;justify-content:center;font-size:13px}
.hook-why{font-size:14.5px;line-height:1.5;color:#dff3e6}

.wrong-row{display:flex;gap:12px;align-items:flex-start;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 13px;margin-bottom:9px}
.wrong-row.picked{border-color:#ff6b6b66;background:#2a1818}
.wrong-row .key.wrong{flex:none;width:26px;height:26px;border-radius:7px;background:#3a2630;color:#ff9a9a;border:1px solid #ff6b6b44;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px}
.wrong-opt{font-weight:650;font-size:14.5px;margin-bottom:3px}
.wrong-why{font-size:13.5px;color:var(--muted);line-height:1.45}

.tip{background:#241b0e;border:1px solid #ff9f3355;border-left:4px solid var(--accent);border-radius:0 12px 12px 0;padding:11px 13px;margin:12px 0 6px;font-size:14.5px;color:#ffe3bb}

/* Self-rating */
.rate-label{margin:14px 0 8px}
.rate-row{display:flex;gap:9px}
.rate{flex:1;min-height:var(--tap);border:1.5px solid var(--line);border-radius:13px;background:var(--panel2);color:var(--ink);font-weight:800;font-size:14px;cursor:pointer;padding:10px 6px}
.rate:active{transform:scale(.98)}
.rate.miss{border-color:#ff6b6b55} .rate.miss:active{background:#2a1818}
.rate.shaky{border-color:#ffc06a55} .rate.shaky:active{background:#2a2210}
.rate.got{border-color:#34d27b66} .rate.got:active{background:#10271b}
.rated{margin-top:12px}

/* Footer nav */
.footer{position:fixed;left:0;right:0;bottom:0;background:linear-gradient(180deg,transparent,var(--bg) 24%);padding:10px 16px calc(12px + env(safe-area-inset-bottom))}
.footer .inner{max-width:720px;margin:0 auto;display:flex;gap:10px;align-items:stretch}
.footer .btn{margin-top:0}
.footer .btn.grow{flex:1}
.footer .btn.secondary{width:auto;padding:14px 16px}
.footer .flagbtn{font-size:18px}

/* Results */
.score-ring{width:150px;height:150px;margin:8px auto 8px;position:relative}
.score-ring svg{transform:rotate(-90deg)}
.score-ring .num{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.score-ring .num b{font-size:36px} .score-ring .num span{font-size:12px;color:var(--muted)}
.result-banner{text-align:center;font-weight:900;font-size:21px;padding:13px;border-radius:13px;margin-bottom:14px}
.result-banner.pass{background:#143a28;color:#8af0b4} .result-banner.fail{background:#3a1c1c;color:#ff9a9a}
.review-item{border:1px solid var(--line);border-radius:13px;padding:13px;margin-bottom:11px}
.review-item.ok{border-color:#34d27b3a} .review-item.no{border-color:#ff6b6b3a}
.review-item .qx{font-weight:700;margin-bottom:9px}
.ln{font-size:14px;margin:6px 0}
.ln .c,.ln.c{color:var(--green)} .ln .x,.ln.x{color:var(--red)}
.ln-why{font-size:12.5px;color:var(--muted);margin:2px 0 0 14px}

/* Toast (streak) */
.toast{position:fixed;left:50%;top:18%;background:linear-gradient(135deg,#3a2410,#2a1d0e);border:1px solid var(--accent);color:var(--accent2);font-weight:900;padding:10px 18px;border-radius:999px;opacity:0;transition:.25s;z-index:50;pointer-events:none;transform:translateX(-50%) translateY(-8px)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}