:root{
  --bg:#f6f5f2;
  --surface:#ffffff;
  --ink:#1b1e24;
  --muted:#6b7280;
  --faint:#9aa1ac;
  --border:#e6e3dd;
  --accent:#0f766e;
  --accent-soft:#e6f4f1;
  --sidebar:#171a20;
  --sidebar-ink:#e8e9ec;
  --sidebar-muted:#8b93a1;
  --radius:14px;
  --shadow:0 1px 2px rgba(20,22,26,.04),0 6px 20px rgba(20,22,26,.05);
  --font:'Manrope','Avenir Next','Segoe UI',sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,Consolas,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:var(--font);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}
button{font-family:inherit;cursor:pointer}
a{color:var(--accent)}

.app{display:grid;grid-template-columns:248px 1fr;min-height:100vh}

/* ---------- Sidebar ---------- */
.sidebar{background:var(--sidebar);color:var(--sidebar-ink);display:flex;flex-direction:column;padding:22px 14px;position:sticky;top:0;height:100vh}
.brand{display:flex;gap:12px;align-items:center;padding:0 8px 22px;border-bottom:1px solid rgba(255,255,255,.08)}
.brand-mark{width:40px;height:40px;border-radius:11px;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:800;font-size:17px;letter-spacing:-.5px}
.brand-name{font-weight:800;font-size:16px;letter-spacing:-.2px}
.brand-sub{font-size:11.5px;color:var(--sidebar-muted)}
.nav{display:flex;flex-direction:column;gap:2px;margin-top:18px;flex:1;overflow-y:auto}
.nav-label{font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--sidebar-muted);padding:14px 10px 6px}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:9px;color:var(--sidebar-ink);text-decoration:none;font-weight:600;font-size:13.5px;border:0;background:none;width:100%;text-align:left;transition:background .15s}
.nav-item:hover{background:rgba(255,255,255,.06)}
.nav-item.active{background:rgba(255,255,255,.1)}
.nav-item .dot{width:8px;height:8px;border-radius:50%;flex:none}
.nav-item .nav-pct{margin-left:auto;font-family:var(--mono);font-size:11px;color:var(--sidebar-muted)}
.nav-item.active .nav-pct{color:var(--sidebar-ink)}
.sidebar-footer{border-top:1px solid rgba(255,255,255,.08);padding-top:12px;display:flex;flex-direction:column;gap:4px}
.side-action{background:none;border:0;color:var(--sidebar-muted);text-align:left;padding:7px 10px;border-radius:8px;font-size:12.5px;font-weight:600}
.side-action:hover{background:rgba(255,255,255,.06);color:var(--sidebar-ink)}
.side-action.danger:hover{color:#f3a7a7}
.side-note{font-size:11px;color:var(--sidebar-muted);padding:6px 10px 0;margin:0}

/* ---------- Main ---------- */
.main{padding:36px 44px 80px;max-width:1180px}
.page-head{margin-bottom:26px}
.eyebrow{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:700;margin:0 0 6px}
h1{font-size:30px;letter-spacing:-.8px;margin:0 0 6px;font-weight:800}
.page-sub{color:var(--muted);margin:0;max-width:640px}

/* ---------- Dashboard ---------- */
.dash-top{display:grid;grid-template-columns:280px 1fr;gap:20px;margin-bottom:26px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.overall-card{padding:24px;display:flex;align-items:center;gap:20px}
.ring{position:relative;width:118px;height:118px;flex:none}
.ring svg{transform:rotate(-90deg)}
.ring-num{position:absolute;inset:0;display:grid;place-items:center;font-family:var(--mono);font-size:25px;font-weight:600}
.overall-meta h2{margin:0 0 4px;font-size:16px;letter-spacing:-.2px}
.overall-meta p{margin:0;color:var(--muted);font-size:13px}
.next-card{padding:20px 22px}
.next-card h2{margin:0 0 4px;font-size:15px}
.next-card p{margin:0 0 12px;color:var(--muted);font-size:13px}
.next-list{display:flex;flex-wrap:wrap;gap:8px}
.next-chip{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--border);background:#fbfaf8;border-radius:999px;padding:6px 12px;font-size:12.5px;font-weight:600;text-decoration:none;color:var(--ink)}
.next-chip:hover{border-color:var(--accent);background:var(--accent-soft)}
.next-chip .dot{width:7px;height:7px;border-radius:50%}

.subject-rows{display:flex;flex-direction:column;gap:12px}
.subject-row{display:grid;grid-template-columns:26px 1.4fr 2fr 92px 110px;align-items:center;gap:16px;padding:18px 22px;text-decoration:none;color:inherit;transition:border-color .15s,transform .15s}
.subject-row:hover{border-color:#c9c4ba;transform:translateY(-1px)}
.subject-row .swatch{width:12px;height:34px;border-radius:6px}
.subject-row h3{margin:0;font-size:16px;letter-spacing:-.2px}
.subject-row .sub-meta{font-size:12px;color:var(--muted)}
.bar{height:8px;background:#edeae4;border-radius:99px;overflow:hidden}
.bar>span{display:block;height:100%;border-radius:99px;transition:width .35s ease}
.pct{font-family:var(--mono);font-size:17px;font-weight:600;text-align:right}
.score-pill{justify-self:end;font-family:var(--mono);font-size:12px;background:#f2f0eb;border:1px solid var(--border);border-radius:8px;padding:5px 9px;color:var(--muted)}
.score-pill.set{background:var(--accent-soft);border-color:#bcdfd8;color:var(--accent);font-weight:600}
.section-title{font-size:13px;font-weight:800;letter-spacing:.02em;margin:30px 0 12px;color:var(--muted);text-transform:uppercase;font-size:11.5px;letter-spacing:.12em}

/* ---------- Subject page ---------- */
.subject-hero{padding:24px 26px;margin-bottom:22px;display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.subject-hero .swatch{width:14px;height:52px;border-radius:7px;flex:none}
.subject-hero h1{font-size:25px;margin:0}
.subject-hero .hero-meta{font-size:12.5px;color:var(--muted)}
.hero-progress{margin-left:auto;text-align:right;min-width:200px}
.hero-progress .pct{font-size:26px}
.hero-progress .bar{margin-top:8px}
.unit-block{margin-top:26px}
.unit-title{display:flex;align-items:baseline;gap:12px;margin:0 0 4px;font-size:19px;letter-spacing:-.3px}
.unit-tag{font-family:var(--mono);font-size:11px;font-weight:600;color:var(--accent);background:var(--accent-soft);padding:3px 8px;border-radius:6px;text-transform:uppercase;letter-spacing:.06em}
.unit-desc{color:var(--muted);font-size:13px;margin:0 0 14px}
.aos{padding:0;margin-bottom:16px;overflow:hidden}
.aos-head{padding:18px 22px 14px;display:flex;gap:14px;align-items:flex-start;border-bottom:1px solid var(--border);background:#fbfaf8}
.aos-head h3{margin:0 0 4px;font-size:16px;letter-spacing:-.2px}
.aos-outcome{margin:0;color:var(--muted);font-size:12.5px;max-width:640px}
.aos-tools{margin-left:auto;display:flex;align-items:center;gap:10px;flex:none}
.aos-count{font-family:var(--mono);font-size:11.5px;color:var(--muted);white-space:nowrap}
.mini-btn{border:1px solid var(--border);background:#fff;border-radius:8px;padding:5px 10px;font-size:11.5px;font-weight:700;color:var(--muted)}
.mini-btn:hover{color:var(--accent);border-color:var(--accent)}
.topics{list-style:none;margin:0;padding:8px 12px 12px}
.topic{display:flex;align-items:center;gap:12px;padding:9px 10px;border-radius:9px;cursor:pointer;transition:background .12s}
.topic:hover{background:#f7f5f0}
.topic input{position:absolute;opacity:0;pointer-events:none}
.checkbox{width:19px;height:19px;flex:none;border:1.6px solid #c8c3b9;border-radius:6px;display:grid;place-items:center;background:#fff;transition:all .15s}
.checkbox svg{opacity:0;transform:scale(.6);transition:all .15s}
.topic input:checked + .checkbox{background:var(--accent);border-color:var(--accent)}
.topic input:checked + .checkbox svg{opacity:1;transform:scale(1)}
.topic input:focus-visible + .checkbox{outline:2px solid var(--accent);outline-offset:2px}
.topic-text{font-size:14px;flex:1}
.topic input:checked ~ .topic-text{color:var(--faint);text-decoration:line-through;text-decoration-color:#cfc9be}
.topic-row{display:flex;align-items:center;gap:4px}
.topic-row .topic{flex:1}
.notes-btn{flex:none;border:1px solid var(--border);background:#fff;border-radius:7px;padding:4px 10px;font-size:11px;font-weight:700;color:var(--muted);margin-right:10px}
.notes-btn:hover{color:var(--accent);border-color:var(--accent)}
.notes-btn[aria-expanded="true"]{background:var(--accent-soft);color:var(--accent);border-color:#bcdfd8}
.note-panel{margin:2px 22px 12px 52px;padding:14px 18px;background:#fbfaf8;border:1px solid var(--border);border-radius:10px;font-size:13px}
.note-panel ul{margin:0;padding-left:18px}
.note-panel li{margin:0 0 6px}
.note-formula{margin:10px 0 0;font-family:var(--mono);font-size:12.5px;background:#f0ede7;border-radius:8px;padding:8px 12px;display:inline-block;white-space:pre-wrap}
.note-tip{margin:10px 0 0;font-size:12.5px;color:var(--accent);font-weight:600}
.source-line{font-size:12px;color:var(--muted);margin-top:22px}

/* ---------- Calculator ---------- */
.calc-subjects{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.calc-tab{border:1px solid var(--border);background:#fff;border-radius:999px;padding:8px 16px;font-size:13px;font-weight:700;color:var(--muted);display:inline-flex;align-items:center;gap:8px}
.calc-tab .dot{width:8px;height:8px;border-radius:50%}
.calc-tab.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.calc-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:20px;align-items:start}
.ga-table{width:100%;border-collapse:collapse}
.ga-table th{font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);text-align:left;padding:14px 22px 10px;border-bottom:1px solid var(--border)}
.ga-table td{padding:13px 22px;border-bottom:1px solid var(--border);font-size:13.5px;vertical-align:middle}
.ga-table tr:last-child td{border-bottom:0}
.ga-name{font-weight:600}
.ga-note{display:block;font-size:11.5px;color:var(--muted);font-weight:400}
.ga-weight{font-family:var(--mono);font-size:12.5px;color:var(--muted);white-space:nowrap}
.ga-input{width:84px;padding:8px 10px;border:1px solid var(--border);border-radius:8px;font-family:var(--mono);font-size:14px;text-align:right;background:#fbfaf8}
.ga-input:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent);background:#fff}
.ga-contrib{font-family:var(--mono);font-size:12.5px;text-align:right;color:var(--muted);white-space:nowrap}
.result-card{padding:26px;position:sticky;top:24px}
.result-label{font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:700;margin:0 0 6px}
.result-score{font-family:var(--mono);font-size:64px;font-weight:600;letter-spacing:-3px;line-height:1;margin:0 0 4px}
.result-score small{font-size:22px;color:var(--faint);letter-spacing:0}
.result-agg{font-family:var(--mono);font-size:13px;color:var(--muted);margin:10px 0 0}
.result-band{display:inline-block;font-size:12px;font-weight:700;border-radius:8px;padding:5px 10px;background:#f2f0eb;color:var(--muted);margin-top:14px}
.result-band.good{background:var(--accent-soft);color:var(--accent)}
.result-note{font-size:12px;color:var(--muted);border-top:1px solid var(--border);margin-top:18px;padding-top:14px;line-height:1.6}
.calc-summary{margin-top:26px;padding:0;overflow:hidden}
.calc-summary .ga-table td{padding:12px 22px}

/* ---------- Subject picker ---------- */
.pick-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin-bottom:22px}
.pick-card{display:flex;align-items:center;gap:12px;background:var(--surface);border:1.5px solid var(--border);border-radius:12px;padding:18px;cursor:pointer;transition:all .15s;flex-wrap:wrap}
.pick-card:hover{border-color:#c9c4ba;transform:translateY(-1px)}
.pick-card input{position:absolute;opacity:0;pointer-events:none}
.pick-card .dot{width:12px;height:12px;border-radius:50%;flex:none}
.pick-name{font-weight:700;font-size:14.5px;letter-spacing:-.2px}
.pick-meta{width:100%;font-size:11.5px;color:var(--muted);padding-left:24px}
.pick-card.picked{border-color:var(--accent);background:var(--accent-soft)}
.pick-card.picked .pick-name{color:var(--accent)}
.primary-btn{background:var(--accent);color:#fff;border:0;border-radius:10px;padding:13px 26px;font-size:14px;font-weight:800;letter-spacing:-.1px;transition:all .15s}
.primary-btn:hover{background:#0b5f59;transform:translateY(-1px)}

/* ---------- Reset dialog ---------- */
.modal-overlay{position:fixed;inset:0;background:rgba(20,22,26,.45);display:grid;place-items:center;z-index:100;animation:fadeIn .18s ease}
.modal{background:var(--surface);border-radius:16px;box-shadow:0 20px 60px rgba(20,22,26,.25);padding:28px;max-width:420px;width:calc(100% - 40px);animation:modalIn .22s cubic-bezier(.22,.61,.36,1)}
.modal h2{margin:0 0 8px;font-size:20px;letter-spacing:-.4px}
.modal p{margin:0 0 20px;color:var(--muted);font-size:13.5px}
.modal-actions{display:flex;flex-direction:column;gap:8px}
.secondary-btn{background:#fff;border:1px solid var(--border);border-radius:10px;padding:11px 18px;font-size:13px;font-weight:700;color:var(--muted);transition:all .15s}
.secondary-btn:hover{border-color:var(--accent);color:var(--accent)}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes modalIn{from{opacity:0;transform:translateY(14px) scale(.97)}to{opacity:1;transform:none}}

/* ---------- Misc ---------- */
.empty{color:var(--muted);font-size:13px;padding:14px 22px}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;font-size:13px;font-weight:600;padding:11px 20px;border-radius:10px;opacity:0;pointer-events:none;transition:all .25s;z-index:50}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- Micro-interactions & motion ---------- */
.mini-btn,.notes-btn,.calc-tab,.side-action,.next-chip{transition:all .15s ease}
.card{transition:box-shadow .2s ease,border-color .15s ease}
a.card:hover{box-shadow:0 2px 4px rgba(20,22,26,.05),0 10px 28px rgba(20,22,26,.09)}
@keyframes pop{0%{transform:scale(.75)}60%{transform:scale(1.15)}100%{transform:scale(1)}}
.topic input:checked + .checkbox{animation:pop .25s ease}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

@media (max-width:1000px){
  .dash-top{grid-template-columns:1fr}
  .calc-grid{grid-template-columns:1fr}
  .result-card{position:static}
  .subject-row{grid-template-columns:20px 1.2fr 1.4fr 70px;}
  .subject-row .score-pill{display:none}
}
@media (max-width:760px){
  .app{grid-template-columns:1fr}
  .sidebar{position:static;height:auto;flex-direction:column}
  .main{padding:24px 18px 60px}
  .nav{flex-direction:row;flex-wrap:wrap}
  .nav-label{width:100%}
  .hero-progress{margin-left:0;text-align:left}
}