:root{
  --ground:#0e1117;--ground-2:#1a202b;--line:#262d3a;--on-ground:#eef1f6;--muted:#9aa3b2;
  --coral:#ff6b5b;--teal:#36c9b0;--ink:#141821;--ink-2:#4a5262;--paper:#fff;--paper-2:#f3f5f9;
  --ok:#1f9d6b;--bad:#d64545;--warn:#f0b429;
  --g-Ap:#22d3a6;--g-A:#4ade80;--g-Bp:#a3e635;--g-B:#facc15;--g-Cp:#fb923c;--g-C:#f97316;--g-S:#f87171;--g-W:#ef4444;
  --font:"Lexend","Noto Sans Sinhala",system-ui,sans-serif;color-scheme:dark}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ground);color:var(--on-ground);font-family:var(--font);line-height:1.5;padding:16px 16px 40px}
.app{max-width:960px;margin:0 auto;display:grid;gap:18px}
.si{line-height:1.75}
button,input{font:inherit}
button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--coral);outline-offset:2px}
a{color:inherit}
.bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}.brand svg{width:52px;height:20px}
.bn{display:grid;line-height:1.15}.bn b{font-weight:800;font-size:1.05rem}.bn small{color:var(--muted);font-size:.72rem}
.right{margin-left:auto;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.lang{display:inline-flex;background:var(--ground-2);border-radius:999px;padding:3px}
.lang button{border:0;cursor:pointer;background:none;color:var(--on-ground);padding:6px 14px;border-radius:999px;font-weight:600}
.lang button[aria-pressed="true"]{background:var(--on-ground);color:var(--ground)}
.who{color:var(--muted);font-size:.85rem}.who button{background:none;border:0;color:var(--teal);cursor:pointer;font-weight:600;padding:2px 4px}
.crumbs{font-size:.85rem;color:var(--muted)}.crumbs a{color:var(--teal);text-decoration:none;font-weight:600}
h1{margin:0;font-size:clamp(1.6rem,4.5vw,2.4rem);font-weight:800;line-height:1.2}
h2{margin:0;font-size:1.15rem;font-weight:800}
.sub{color:var(--muted);margin:6px 0 0}
.chip{display:inline-block;background:var(--ground-2);border:1px solid var(--line);color:var(--teal);font-weight:600;font-size:.8rem;padding:4px 10px;border-radius:999px}
.card{background:var(--paper);color:var(--ink);border-radius:18px;padding:18px;display:grid;gap:12px}
.card h2{color:var(--ink)}.card p{margin:0;color:var(--ink-2)}
.dark{background:linear-gradient(135deg,#1b2436,#141a26);color:var(--on-ground);border:1px solid var(--line)}
.dark h2{color:var(--on-ground)}.dark p{color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:12px 22px;font-weight:800;font-size:1rem;cursor:pointer;text-decoration:none;background:var(--coral);color:#fff}
.btn.teal{background:var(--teal);color:#06231e}.btn.ghost{background:transparent;border:2px solid currentColor;color:var(--teal)}
.btn.small{padding:7px 14px;font-size:.88rem}.btn[disabled]{opacity:.5;cursor:default}
.err{color:#ff8e80;min-height:1.2em;margin:0;font-size:.9rem}
.signin{display:grid;gap:8px;max-width:520px}.signin label{font-weight:600;font-size:.9rem;color:var(--ink)}
.signin input[type=text],.signin input[type=tel]{font-size:1.05rem;padding:10px 12px;border-radius:10px;border:2px solid #d5d9e1;color:var(--ink);background:#fff}
.signin .keep{display:flex;gap:8px;align-items:center;font-weight:400}
.signin .err{color:var(--bad)}
.how{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px}
.how div{background:var(--paper-2);border-radius:12px;padding:12px;color:var(--ink);font-size:.92rem}.how b{display:block;margin-bottom:2px}

/* ---- grades ---- */
.gr{display:inline-grid;place-items:center;min-width:2.2em;padding:.1em .55em;border-radius:999px;font-weight:800;color:#0e1117;background:var(--c,#888);line-height:1.4}
.gr[data-g="A+"]{--c:var(--g-Ap)}.gr[data-g="A"]{--c:var(--g-A)}.gr[data-g="B+"]{--c:var(--g-Bp)}.gr[data-g="B"]{--c:var(--g-B)}
.gr[data-g="C+"]{--c:var(--g-Cp)}.gr[data-g="C"]{--c:var(--g-C)}.gr[data-g="S"]{--c:var(--g-S)}.gr[data-g="W"]{--c:var(--g-W);color:#fff}
.gr[data-g="-"]{--c:#3a4252;color:#cbd2de}
.stand{display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:center}
@media(max-width:560px){.stand{grid-template-columns:1fr;justify-items:center;text-align:center}}
.ring{--p:0;--c:#888;width:168px;height:168px;border-radius:50%;display:grid;place-items:center;
  background:conic-gradient(var(--c) calc(var(--p)*1%),#2a3242 0);position:relative;transition:background .6s}
.ring::before{content:"";position:absolute;inset:12px;border-radius:50%;background:#141a26}
.ring>div{position:relative;display:grid;place-items:center;line-height:1}
.ring b{font-size:3.4rem;font-weight:800;color:var(--c)}.ring small{color:var(--muted);font-size:.9rem;margin-top:6px}
.ring[data-g="A+"]{--c:var(--g-Ap)}.ring[data-g="A"]{--c:var(--g-A)}.ring[data-g="B+"]{--c:var(--g-Bp)}.ring[data-g="B"]{--c:var(--g-B)}
.ring[data-g="C+"]{--c:var(--g-Cp)}.ring[data-g="C"]{--c:var(--g-C)}.ring[data-g="S"]{--c:var(--g-S)}.ring[data-g="W"]{--c:var(--g-W)}.ring[data-g="-"]{--c:#566074}
.ring.sm{width:96px;height:96px}.ring.sm::before{inset:8px}.ring.sm b{font-size:1.9rem}.ring.sm small{font-size:.7rem;margin-top:3px}
.ladder{display:flex;gap:4px;flex-wrap:wrap;margin-top:8px}
.ladder span{flex:1;min-width:34px;text-align:center;font-weight:800;font-size:.85rem;padding:5px 0;border-radius:8px;background:#222a39;color:#7d879a;border:2px solid transparent}
.ladder span.on{color:#0e1117;background:var(--c);border-color:#fff;transform:translateY(-2px)}
.ladder span[data-g="A+"]{--c:var(--g-Ap)}.ladder span[data-g="A"]{--c:var(--g-A)}.ladder span[data-g="B+"]{--c:var(--g-Bp)}.ladder span[data-g="B"]{--c:var(--g-B)}
.ladder span[data-g="C+"]{--c:var(--g-Cp)}.ladder span[data-g="C"]{--c:var(--g-C)}.ladder span[data-g="S"]{--c:var(--g-S)}.ladder span[data-g="W"]{--c:var(--g-W)}.ladder span[data-g="W"].on{color:#fff}
.note{border-radius:12px;padding:10px 14px;font-size:.93rem;font-weight:600}
.note.warn{background:#3a2a10;color:#ffd58a;border:1px solid #6b4c12}
.note.good{background:#0f3a2e;color:#8cf0d2;border:1px solid #1d6b55}
.note.bad{background:#40181a;color:#ffb0a8;border:1px solid #7a2a2d}
.units{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px}
.unit{display:flex;gap:14px;align-items:center;background:var(--ground-2);border:1px solid var(--line);border-radius:16px;padding:12px 14px}
.unit b{display:block}.unit small{color:var(--muted)}
.todaycard{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center}
@media(max-width:560px){.todaycard{grid-template-columns:1fr}}
.pbar{height:8px;border-radius:9px;background:#e6e9f0;overflow:hidden}.pbar i{display:block;height:100%;background:var(--teal)}
.list{display:grid;gap:8px}
.row{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;background:var(--paper-2);border-radius:14px;padding:10px 12px;color:var(--ink);text-decoration:none}
.row .ico{font-size:1.3rem;width:2rem;text-align:center}.row b{display:block;line-height:1.3}.row small{color:var(--ink-2)}
.row.missed{background:#fdecec;border:2px solid #f3b0b0}.row.today{background:#e8f8f4;border:2px solid var(--teal)}.row.done{opacity:.95}
.tags{display:grid;gap:8px}
.tag{display:grid;grid-template-columns:3.2rem 1fr auto;gap:10px;align-items:center;font-size:.92rem;color:var(--ink)}
.tag .bar2{height:10px;border-radius:9px;background:#e6e9f0;overflow:hidden}.tag .bar2 i{display:block;height:100%;background:var(--ok)}.tag .bar2 i.weak{background:var(--bad)}.tag .bar2 i.mid{background:var(--warn)}
.tag small{color:var(--ink-2);display:block;line-height:1.35}
.soon{background:var(--ground-2);border:1px dashed #3a4356;border-radius:16px;padding:14px 16px;color:var(--muted)}
.foot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:.8rem;border-top:1px solid var(--line);padding-top:14px}
.spark{width:100%;height:60px}

/* ---- quiz ---- */
.hud{position:sticky;top:0;z-index:20;background:rgba(14,17,23,.96);backdrop-filter:blur(6px);margin:-16px -16px 0;padding:10px 16px;border-bottom:1px solid var(--line)}
.hud-in{max-width:960px;margin:0 auto;display:grid;gap:8px}
.hud-top{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.hud-top .t{font-weight:800}.stat{display:inline-flex;gap:6px;align-items:center;background:var(--ground-2);border:1px solid var(--line);border-radius:999px;padding:3px 10px;font-weight:700;font-size:.9rem}
.stat.ok b{color:#5de0b0}.stat.no b{color:#ff8e80}
.ticks{display:grid;grid-template-columns:repeat(var(--n,50),1fr);gap:2px}
.ticks i{height:7px;border-radius:3px;background:#2a3242}.ticks i.y{background:var(--teal)}.ticks i.n{background:var(--coral)}.ticks i.cur{background:#fff}
.live{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:.88rem;color:var(--muted)}
.live b{color:var(--on-ground)}.arrow{color:var(--muted)}
.q{display:grid;gap:14px}
.qtag{display:flex;gap:8px;align-items:center;flex-wrap:wrap;color:var(--ink-2);font-size:.85rem;font-weight:600}
.qtext{font-size:1.08rem;font-weight:600;color:var(--ink);white-space:pre-wrap}
.opts{display:grid;gap:8px}
.opt{display:grid;grid-template-columns:2rem 1fr;gap:10px;align-items:start;text-align:left;background:var(--paper-2);border:2px solid #dfe3ea;border-radius:14px;padding:12px;color:var(--ink);cursor:pointer;font-size:1rem}
.opt:hover:not([disabled]){border-color:var(--teal)}
.opt .n{display:grid;place-items:center;width:1.8rem;height:1.8rem;border-radius:50%;background:#fff;border:2px solid #cfd5df;font-weight:800;font-size:.85rem}
.opt.right{background:#e3f6ec;border-color:var(--ok)}.opt.right .n{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.wrong{background:#fdecec;border-color:var(--bad)}.opt.wrong .n{background:var(--bad);border-color:var(--bad);color:#fff}
.opt[disabled]{cursor:default}
.fb{border-radius:12px;padding:10px 14px;font-weight:600}.fb.y{background:#e3f6ec;color:#12603f}.fb.n{background:#fdecec;color:#8b2323}
.fb small{display:block;font-weight:400;margin-top:2px}
.nav{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.res{display:grid;gap:16px}
.bigres{display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:center}
@media(max-width:560px){.bigres{grid-template-columns:1fr;justify-items:center;text-align:center}}
.delta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-weight:700}
.rev{display:grid;gap:8px}.rev details{background:var(--paper-2);border-radius:12px;padding:10px 12px;color:var(--ink)}
.rev summary{cursor:pointer;font-weight:600}.rev p{margin:6px 0 0;color:var(--ink-2)}.rev .c{color:#12603f;font-weight:700}.rev .w{color:#8b2323}
.toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);background:#fff;color:var(--ink);padding:10px 18px;border-radius:999px;font-weight:700;box-shadow:0 8px 30px rgba(0,0,0,.4);z-index:50}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}