/* Layout: sticky title-block header with four views (dashboard, topics, study log, scores) in one centered column; subject colors identify HPGE / MSTC / PSAD everywhere. */
:root{
  color-scheme:light;
  --bg:#EEF1F5; --surface:#FBFCFD; --surface-2:#F2F5F8; --ink:#101A26; --ink-2:#4A5666; --ink-3:#66717F;
  --line:#DDE2E9; --grid:#E6EAF0; --axis:#BCC4CF; --accent:#243E5C; --on-accent:#FFFFFF; --focus:#2A78D6;
  --hpge:#2a78d6; --mstc:#eb6834; --psad:#1baf7a; --ok:#006300; --err:#B3261E; --warn-bg:#FFF4DA; --warn-ink:#6B4A00;
  --f-display:"Barlow Condensed","Arial Narrow",system-ui,sans-serif;
  --f-body:"Barlow",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0E141B; --surface:#151D27; --surface-2:#1B2531; --ink:#EAF0F7; --ink-2:#B3BFCC; --ink-3:#8D9AAA;
  --line:#26323F; --grid:#222D39; --axis:#3A4756; --accent:#A9C2DE; --on-accent:#0E141B; --focus:#6DA7EC;
  --hpge:#3987e5; --mstc:#d95926; --psad:#199e70; --ok:#0ca30c; --err:#F2A39D; --warn-bg:#3A2F10; --warn-ink:#F2D58A; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0E141B; --surface:#151D27; --surface-2:#1B2531; --ink:#EAF0F7; --ink-2:#B3BFCC; --ink-3:#8D9AAA;
  --line:#26323F; --grid:#222D39; --axis:#3A4756; --accent:#A9C2DE; --on-accent:#0E141B; --focus:#6DA7EC;
  --hpge:#3987e5; --mstc:#d95926; --psad:#199e70; --ok:#0ca30c; --err:#F2A39D; --warn-bg:#3A2F10; --warn-ink:#F2D58A; color-scheme:dark}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font:15px/1.5 var(--f-body);padding-inline:max(16px,env(safe-area-inset-left,0px)) max(16px,env(safe-area-inset-right,0px));padding-block:0 48px;min-height:100%}
h1,h2,h3{font-family:var(--f-display);font-weight:600;margin:0;letter-spacing:.01em;text-wrap:balance}
button,select,input,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:4px}
.wrap{max-width:1120px;margin-inline:auto;min-width:0}
.mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums}
.muted{color:var(--ink-3)} .sec{color:var(--ink-2)}
.eyebrow{font:500 11px/1 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
/* header */
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);background:var(--surface);z-index:30}
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--surface);border-bottom:1px solid var(--line);margin-inline:calc(-1*max(16px,env(safe-area-inset-left,0px))) calc(-1*max(16px,env(safe-area-inset-right,0px)));padding-inline:max(16px,env(safe-area-inset-left,0px)) max(16px,env(safe-area-inset-right,0px))}
.top .wrap{display:flex;align-items:center;gap:12px 20px;flex-wrap:wrap;padding-block:10px}
.brand{display:flex;flex-direction:column;gap:2px;margin-right:auto}
.brand h1{font-size:24px;line-height:1;text-transform:uppercase;letter-spacing:.04em}
.nav{display:flex;gap:2px;flex-wrap:wrap}
.nav a{padding:8px 14px;border-radius:6px;color:var(--ink-2);text-decoration:none;font-weight:500}
.nav a:hover{background:var(--surface-2)}
.nav a[aria-current="page"]{background:var(--accent);color:var(--on-accent)}
.who{display:flex;align-items:center;gap:10px;font-size:13px}
.who img{width:28px;height:28px;border-radius:50%;border:1px solid var(--line)}
.sync{font:500 11px/1 var(--f-mono);color:var(--ink-3);display:flex;align-items:center;gap:6px}
.sync i{width:7px;height:7px;border-radius:50%;background:var(--psad);display:inline-block}
.sync.busy i{background:var(--mstc)}
main{padding-block:20px;display:grid;gap:20px}
/* surfaces */
.card{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:18px;min-width:0}
.card h2{font-size:20px;text-transform:uppercase;letter-spacing:.03em}
.card-h{display:flex;justify-content:space-between;align-items:baseline;gap:8px 16px;flex-wrap:wrap;margin-bottom:12px}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,340px),1fr));gap:20px}
.btn{background:var(--accent);color:var(--on-accent);border:0;border-radius:6px;padding:8px 14px;font-weight:500;cursor:pointer}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{background:var(--surface-2)}
.btn.sm{padding:4px 10px;font-size:13px}
.btn[disabled]{opacity:.5;cursor:not-allowed}
input[type=text],input[type=email],input[type=password],input[type=date],input[type=number],select,textarea{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:7px 9px;min-width:0;max-width:100%}
textarea{width:100%;resize:vertical;min-height:64px}
label.f{display:grid;gap:4px;font-size:13px;color:var(--ink-2)}
.banner{background:var(--warn-bg);color:var(--warn-ink);border-radius:8px;padding:10px 14px;font-size:14px;display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.sw{width:10px;height:10px;border-radius:2px;display:inline-block;flex:none}
.sw.hpge{background:var(--hpge)} .sw.mstc{background:var(--mstc)} .sw.psad{background:var(--psad)}
/* hero */
.hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);gap:24px}
@media(max-width:760px){.hero{grid-template-columns:1fr}}
.big{font:600 76px/0.95 var(--f-display);letter-spacing:-.01em}
.big small{font-size:34px;color:var(--ink-3)}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;margin-top:16px}
.fact b{display:block;font:500 20px/1.2 var(--f-mono)}
.fact span{font-size:12px;color:var(--ink-3)}
/* status bars */
.sbar{display:flex;gap:2px;height:14px}
.sbar i{display:block;height:100%;border-radius:3px;min-width:0}
.st-m{background:var(--accent)} .st-r{background:color-mix(in srgb,var(--accent) 62%,var(--surface))}
.st-l{background:color-mix(in srgb,var(--accent) 34%,var(--surface))} .st-t{background:var(--surface-2);box-shadow:inset 0 0 0 1px var(--line)}
.legend{display:flex;gap:6px 16px;flex-wrap:wrap;font-size:12px;color:var(--ink-2);margin-top:10px}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{width:10px;height:10px;border-radius:2px;display:inline-block}
.subrow{display:grid;gap:6px;margin-bottom:16px}
.subrow .l{display:flex;justify-content:space-between;gap:12px;align-items:baseline;flex-wrap:wrap}
.subrow .l b{display:flex;gap:8px;align-items:center;font-family:var(--f-display);font-size:18px;letter-spacing:.04em}
/* charts */
svg text{font-family:var(--f-mono);font-size:10.5px;fill:var(--ink-3)}
.chart{width:100%;height:auto;display:block;overflow:visible}
.heat{display:grid;grid-auto-flow:column;grid-template-rows:repeat(7,1fr);gap:3px}
.heat i{aspect-ratio:1;border-radius:2px;background:var(--surface-2);box-shadow:inset 0 0 0 1px var(--line);min-width:0}
.heat-wrap{overflow-x:auto;padding-bottom:4px}
.tip{position:fixed;z-index:60;pointer-events:none;background:var(--ink);color:var(--bg);padding:6px 9px;border-radius:6px;font:500 12px/1.35 var(--f-mono);max-width:240px;display:none}
details.tbl{margin-top:10px;font-size:12px;color:var(--ink-2)}
details.tbl summary{cursor:pointer}
.tbl-s{overflow-x:auto}
.tbl-s table{border-collapse:collapse;width:100%}
.tbl-s th,.tbl-s td{padding:3px 8px;text-align:left;border-bottom:1px solid var(--line);font-family:var(--f-mono)}
/* focus list */
.next{display:grid;gap:8px;margin:0;padding:0;list-style:none}
.next li{display:flex;gap:10px;align-items:center;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:var(--surface-2);min-width:0}
.next li a{color:inherit;text-decoration:none;flex:1;min-width:0;overflow-wrap:anywhere}
.next li a:hover{text-decoration:underline}
.pri{font:500 10px/1 var(--f-mono);letter-spacing:.06em;text-transform:uppercase;padding:3px 6px;border-radius:4px;border:1px solid var(--line);color:var(--ink-2);white-space:nowrap}
.pri.p1{background:var(--accent);color:var(--on-accent);border-color:transparent}
/* topics */
.tools{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.tools input[type=text]{flex:1 1 180px}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:5px 12px;cursor:pointer;display:inline-flex;gap:7px;align-items:center;font-size:13px}
.chip[aria-pressed="true"]{background:var(--accent);color:var(--on-accent);border-color:transparent}
.sub-h{display:flex;gap:16px;flex-wrap:wrap;align-items:baseline;justify-content:space-between}
.sub-h h2{display:flex;gap:10px;align-items:center}
.topic{border:1px solid var(--line);border-radius:10px;background:var(--surface);overflow:hidden}
.topic-h{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:6px 12px;align-items:center;padding:10px 12px;width:100%;text-align:left;background:none;border:0;cursor:pointer}
.topic-h:hover{background:var(--surface-2)}
.ord{font:500 12px/1 var(--f-mono);color:var(--ink-3);width:24px}
.t-name{font-weight:600;overflow-wrap:anywhere}
.t-meta{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.t-bar{width:96px}
.caret{transition:transform .15s;color:var(--ink-3)}
.topic.open .caret{transform:rotate(90deg)}
.topic-b{border-top:1px solid var(--line);padding:6px 12px 12px;display:none}
.topic.open .topic-b{display:block}
.setall{display:flex;gap:8px;align-items:center;justify-content:flex-end;font-size:12px;color:var(--ink-3);padding:6px 0}
.srow{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px 12px;padding:8px 0;border-top:1px solid var(--grid);align-items:center}
.srow:first-of-type{border-top:0}
.s-name{overflow-wrap:anywhere}
.s-ctl{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
select.st{padding:4px 8px;font-size:13px;border-left-width:4px}
select.st.m{border-left-color:var(--accent)} select.st.r{border-left-color:color-mix(in srgb,var(--accent) 62%,var(--surface))}
select.st.l{border-left-color:color-mix(in srgb,var(--accent) 34%,var(--surface))}
.conf{display:inline-flex;gap:2px}
.conf button{width:16px;height:16px;border-radius:3px;border:1px solid var(--axis);background:transparent;padding:0;cursor:pointer}
.conf button.on{background:var(--accent);border-color:var(--accent)}
.note-btn{border:1px solid var(--line);background:transparent;border-radius:6px;padding:3px 8px;font-size:12px;cursor:pointer;color:var(--ink-2)}
.note-btn.has{color:var(--ink);border-color:var(--ink-3)}
.note-box{grid-column:1/-1;display:none}
.srow.noting .note-box{display:block}
.last{font:400 11px/1 var(--f-mono);color:var(--ink-3)}
/* lists + forms */
.form{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,150px),1fr));gap:12px;align-items:end}
.rows{display:grid;margin:0;padding:0;list-style:none}
.rows li{display:flex;gap:12px;align-items:center;padding:9px 0;border-top:1px solid var(--grid);flex-wrap:wrap;min-width:0}
.rows li .grow{flex:1;min-width:160px;overflow-wrap:anywhere}
.x{background:none;border:0;color:var(--ink-3);cursor:pointer;font-size:18px;line-height:1;padding:4px 8px;border-radius:4px}
.x:hover{color:var(--ink);background:var(--surface-2)}
.empty{padding:24px 8px;text-align:center;color:var(--ink-3)}
.gate{max-width:520px;margin:12vh auto;text-align:center;display:grid;gap:12px}
.gate h1{font-size:36px;text-transform:uppercase}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(16px + env(safe-area-inset-bottom,0px));background:var(--ink);color:var(--bg);padding:8px 14px;border-radius:8px;font-size:13px;z-index:70;display:none;max-width:90vw}
@media(max-width:480px){.t-bar{display:none}.big{font-size:64px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

html,body{margin:0}
.auth{margin:8vh auto}
.auth form{text-align:left;display:grid;gap:12px;padding:20px}
.auth input{width:100%}
.seg{display:flex;gap:4px;background:var(--surface-2);padding:3px;border-radius:8px}
.seg button{flex:1;border:0;background:transparent;padding:7px 10px;border-radius:6px;cursor:pointer;color:var(--ink-2);font-weight:500}
.seg button[aria-pressed="true"]{background:var(--accent);color:var(--on-accent)}
.msg{font-size:13px;min-height:18px;color:var(--ok)}
.msg.err{color:var(--err)}
.auth-alt{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.linkbtn{background:none;border:0;padding:2px 0;color:var(--ink-2);text-decoration:underline;cursor:pointer;font-size:13px}
.linkbtn:hover{color:var(--ink)}