:root{
  --c25:#1D9E75; --c25d:#0F6E56; --c25bg:#E1F5EE;
  --c26:#D85A30; --c26d:#993C1D; --c26bg:#FAECE7;
  --ink:#1d1d1b; --muted:#5f5e5a; --faint:#8a8983;
  --line:rgba(20,20,18,.10); --line2:rgba(20,20,18,.18);
  --bg:#faf9f6; --card:#ffffff; --soft:#f2f0ea;
  --r:14px; --rs:10px;
  --shadow:0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.05);
  --maxw:1100px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  line-height:1.65; -webkit-font-smoothing:antialiased;
}
a{color:inherit}
img{max-width:100%}
.wrap{max-width:var(--maxw); margin:0 auto; padding:0 20px}

/* ---------- NAV ---------- */
.nav{
  position:sticky; top:0; z-index:50; backdrop-filter:saturate(1.4) blur(8px);
  background:rgba(250,249,246,.85); border-bottom:1px solid var(--line);
}
.nav .wrap{display:flex; align-items:center; gap:18px; height:60px}
.brand{font-weight:600; font-size:16px; letter-spacing:-.01em; display:flex; align-items:center; gap:9px}
.brand .dot{width:11px;height:11px;border-radius:50%;background:var(--c26)}
.nav nav{margin-left:auto; display:flex; gap:6px; flex-wrap:wrap}
.nav nav a{
  font-size:13.5px; color:var(--muted); text-decoration:none; padding:7px 12px;
  border-radius:999px; transition:.15s;
}
.nav nav a:hover{color:var(--ink); background:var(--soft)}
.menu-btn{display:none}

/* ---------- HERO ---------- */
.hero{padding:64px 0 40px}
.kicker{
  display:inline-flex; align-items:center; gap:8px; font-size:13px; font-weight:500;
  color:var(--c26d); background:var(--c26bg); padding:6px 13px; border-radius:999px; margin-bottom:20px;
}
.hero h1{
  font-size:clamp(30px,5vw,52px); line-height:1.08; letter-spacing:-.025em;
  font-weight:700; margin:0 0 18px; max-width:14ch;
}
.hero h1 .hl25{color:var(--c25d)}
.hero h1 .hl26{color:var(--c26d)}
.hero .lead{font-size:clamp(17px,2.2vw,20px); color:var(--muted); max-width:62ch; margin:0 0 28px}
.verdict-pill{
  display:inline-flex; align-items:center; gap:10px; background:var(--card); border:1px solid var(--line);
  border-radius:999px; padding:9px 18px 9px 12px; font-size:15px; box-shadow:var(--shadow); font-weight:500;
}
.verdict-pill b{color:var(--c26d)}
.win-badge{font-size:12px; font-weight:600; color:#fff; background:var(--c26); padding:4px 10px; border-radius:999px}

/* ---------- SECTIONS ---------- */
section{padding:46px 0; scroll-margin-top:72px}
.sec-head{margin-bottom:26px; max-width:70ch}
.sec-head .eyebrow{font-size:13px; font-weight:600; letter-spacing:.04em; text-transform:uppercase; color:var(--c26); margin:0 0 8px}
.sec-head h2{font-size:clamp(24px,3.4vw,34px); letter-spacing:-.02em; font-weight:700; margin:0 0 10px}
.sec-head p{font-size:16.5px; color:var(--muted); margin:0}

/* ---------- METRIC CARDS ---------- */
.metrics{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
.metric{
  background:var(--card); border:1px solid var(--line); border-radius:var(--r); padding:22px 22px 20px;
  box-shadow:var(--shadow); position:relative; overflow:hidden;
}
.metric .lbl{font-size:14px; color:var(--muted); font-weight:500; margin-bottom:14px; display:flex; align-items:center; gap:8px}
.metric .vals{display:flex; align-items:baseline; gap:10px}
.metric .v{font-size:34px; font-weight:700; letter-spacing:-.02em}
.metric .arr{font-size:20px; color:var(--faint)}
.metric .v25{color:var(--c25d)}
.metric .v26{color:var(--c26d)}
.metric .delta{margin-top:12px; font-size:13.5px; font-weight:500; display:inline-flex; align-items:center; gap:6px}
.metric .delta.up{color:var(--c26d)}
.metric .delta.eq{color:var(--muted)}
.metric .bar{position:absolute; left:0; bottom:0; height:4px; width:100%}

/* ---------- CARDS / GRID ---------- */
.card{background:var(--card); border:1px solid var(--line); border-radius:var(--r); padding:22px; box-shadow:var(--shadow)}
.grid2{display:grid; grid-template-columns:1fr 1fr; gap:18px}
.chart-card h3{font-size:16px; font-weight:600; margin:0 0 4px}
.chart-card .sub{font-size:13.5px; color:var(--muted); margin:0 0 16px}
.chart-box{position:relative; width:100%}
.legend{display:flex; gap:18px; flex-wrap:wrap; font-size:13px; color:var(--muted); margin-bottom:14px}
.legend span{display:inline-flex; align-items:center; gap:7px}
.legend i{width:12px;height:12px;border-radius:3px; display:inline-block}

/* ---------- SUBJECT CARDS ---------- */
.subjects{display:grid; grid-template-columns:repeat(2,1fr); gap:18px}
.subj{background:var(--card); border:1px solid var(--line); border-radius:var(--r); padding:20px 22px; box-shadow:var(--shadow)}
.subj .top{display:flex; align-items:center; justify-content:space-between; margin-bottom:14px; gap:12px}
.subj .name{font-size:18px; font-weight:600; display:flex; align-items:center; gap:10px}
.subj .ic{width:34px;height:34px;border-radius:9px; display:grid; place-items:center; font-size:18px; background:var(--soft)}
.subj .who{font-size:12px; font-weight:600; padding:5px 11px; border-radius:999px; white-space:nowrap}
.who.y25{background:var(--c25bg); color:var(--c25d)}
.who.y26{background:var(--c26bg); color:var(--c26d)}
.who.eq{background:var(--soft); color:var(--muted)}
.subj .scores{display:flex; gap:18px; margin-bottom:14px}
.subj .sc{flex:1}
.subj .sc .yr{font-size:12px; color:var(--faint); font-weight:600; margin-bottom:3px}
.subj .sc .num{font-size:26px; font-weight:700; letter-spacing:-.02em}
.subj .track{height:7px; border-radius:99px; background:var(--soft); margin-top:8px; overflow:hidden}
.subj .track i{display:block; height:100%; border-radius:99px}
.subj p.txt{font-size:14px; color:var(--muted); margin:6px 0 0; line-height:1.6}

/* ---------- HEATMAP ---------- */
.heat-controls{display:flex; gap:10px; align-items:center; flex-wrap:wrap; margin-bottom:18px}
.heat-legend{display:flex; align-items:center; gap:7px; font-size:12.5px; color:var(--muted); margin-left:auto}
.heat-legend .ramp{display:flex; border-radius:5px; overflow:hidden; border:1px solid var(--line)}
.heat-legend .ramp i{width:22px;height:14px;display:block}
.heatblock{margin-bottom:22px}
.heatblock h4{font-size:14px; margin:0 0 10px; font-weight:600; display:flex; align-items:center; gap:9px}
.heat-row{display:flex; align-items:center; gap:8px; margin-bottom:5px}
.heat-row .rl{width:78px; font-size:12.5px; color:var(--muted); text-align:right; flex-shrink:0; font-weight:500}
.heat-cells{display:grid; grid-template-columns:repeat(20,1fr); gap:4px; flex:1}
.cell{aspect-ratio:1; border-radius:4px; cursor:default; position:relative; transition:transform .1s}
.cell:hover{transform:scale(1.22); z-index:5; box-shadow:0 2px 8px rgba(0,0,0,.2)}
.cell.empty{background:transparent !important; cursor:default}
.cell.empty:hover{transform:none; box-shadow:none}
.colnums{display:flex; gap:4px; margin:2px 0 0 86px}
.colnums div{flex:1; text-align:center; font-size:9px; color:var(--faint)}

/* tooltip */
#tip{position:fixed; pointer-events:none; z-index:100; background:#1d1d1b; color:#fff; padding:9px 12px; border-radius:9px; font-size:12.5px; max-width:240px; opacity:0; transition:opacity .12s; box-shadow:0 6px 20px rgba(0,0,0,.25); line-height:1.45}
#tip b{color:#fff}
#tip .d{display:inline-block; padding:1px 7px; border-radius:99px; font-weight:600; font-size:11px; color:#1d1d1b}

/* ---------- METHOD ---------- */
.steps{display:grid; grid-template-columns:repeat(4,1fr); gap:16px; counter-reset:s}
.step{background:var(--card); border:1px solid var(--line); border-radius:var(--r); padding:20px; box-shadow:var(--shadow); position:relative}
.step .n{width:32px;height:32px;border-radius:9px;background:var(--c26bg); color:var(--c26d); display:grid; place-items:center; font-weight:700; margin-bottom:12px}
.step h4{margin:0 0 6px; font-size:15.5px; font-weight:600}
.step p{margin:0; font-size:13.5px; color:var(--muted)}
.callout{margin-top:20px; background:var(--c25bg); border:1px solid rgba(15,110,86,.18); border-radius:var(--r); padding:16px 20px; font-size:14.5px; color:var(--c25d); display:flex; gap:12px; align-items:flex-start}
.callout b{font-weight:600}

/* ---------- EXPLORER ---------- */
.filters{display:flex; gap:10px; flex-wrap:wrap; align-items:center; margin-bottom:18px}
.filters .chips{display:flex; gap:6px; background:var(--soft); padding:4px; border-radius:11px}
.chip{border:none; background:transparent; padding:7px 14px; border-radius:8px; font-size:13.5px; cursor:pointer; color:var(--muted); font-weight:500; transition:.15s; font-family:inherit}
.chip.on{background:var(--card); color:var(--ink); box-shadow:0 1px 3px rgba(0,0,0,.08)}
select,input[type=search]{
  font-family:inherit; font-size:14px; padding:9px 13px; border:1px solid var(--line2); border-radius:10px;
  background:var(--card); color:var(--ink); outline:none;
}
input[type=search]{flex:1; min-width:180px}
select:focus,input:focus{border-color:var(--c26)}
.tbl-wrap{background:var(--card); border:1px solid var(--line); border-radius:var(--r); overflow:hidden; box-shadow:var(--shadow)}
table{width:100%; border-collapse:collapse; font-size:14px}
thead th{text-align:left; font-size:12px; text-transform:uppercase; letter-spacing:.03em; color:var(--faint); font-weight:600; padding:13px 14px; border-bottom:1px solid var(--line); background:var(--soft)}
tbody td{padding:12px 14px; border-bottom:1px solid var(--line); vertical-align:top}
tbody tr{cursor:pointer; transition:background .12s}
tbody tr:hover{background:var(--soft)}
tbody tr:last-child td{border-bottom:none}
.yrtag{font-size:11px; font-weight:600; padding:3px 8px; border-radius:6px}
.yrtag.y25{background:var(--c25bg); color:var(--c25d)}
.yrtag.y26{background:var(--c26bg); color:var(--c26d)}
.dbadge{font-size:12px; font-weight:700; padding:3px 9px; border-radius:7px; color:#3a2a12; display:inline-block; min-width:34px; text-align:center}
.ans{font-weight:600; font-family:'Inter',monospace}
.ok{color:var(--c25d)} .no{color:var(--c26d)}
.detail{font-size:13.5px; color:var(--muted); background:var(--soft)}
.detail td{padding:14px 16px}
.detail .tags{display:flex; gap:7px; flex-wrap:wrap; margin-top:10px}
.detail .tg{font-size:11.5px; background:var(--card); border:1px solid var(--line); padding:3px 9px; border-radius:7px; color:var(--muted)}
.count{font-size:13.5px; color:var(--muted); margin-bottom:12px}

/* ---------- FOOTER ---------- */
footer{border-top:1px solid var(--line); padding:34px 0 50px; margin-top:30px; color:var(--muted); font-size:13.5px}
footer .wrap{display:flex; justify-content:space-between; gap:20px; flex-wrap:wrap; align-items:center}
.dlbtn{display:inline-flex; align-items:center; gap:8px; text-decoration:none; font-weight:500; color:var(--ink); border:1px solid var(--line2); padding:9px 15px; border-radius:10px; background:var(--card); transition:.15s; font-size:14px}
.dlbtn:hover{background:var(--soft)}

/* ---------- RESPONSIVE ---------- */
@media(max-width:820px){
  .metrics{grid-template-columns:1fr}
  .grid2{grid-template-columns:1fr}
  .subjects{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .nav nav{display:none}
  .heat-cells{gap:3px}
  .heat-row .rl{width:60px; font-size:11px}
  .colnums{margin-left:68px}
  thead th:nth-child(4), tbody td:nth-child(4){display:none}
}
@media(max-width:520px){
  .steps{grid-template-columns:1fr}
  .hero{padding:40px 0 24px}
  .colnums div{font-size:8px}
}

/* ============ DARK MODE ============ */
body.dark{
  --ink:#ededeb; --muted:#a9a8a1; --faint:#7a796f;
  --line:rgba(255,255,255,.10); --line2:rgba(255,255,255,.20);
  --bg:#141417; --card:#1e1e23; --soft:#28282f;
  --c25d:#5DCAA5; --c26d:#F0997B; --c25bg:rgba(29,158,117,.17); --c26bg:rgba(216,90,48,.18);
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 10px 30px rgba(0,0,0,.45);
}
body.dark .nav{background:rgba(20,20,23,.85)}
body.dark .dbadge{filter:saturate(.95)}
.theme-btn{
  width:38px; height:38px; border-radius:10px; border:1px solid var(--line2); background:var(--card);
  color:var(--ink); cursor:pointer; font-size:17px; display:grid; place-items:center; transition:.15s; flex-shrink:0;
}
.theme-btn:hover{background:var(--soft)}

/* ============ GALLERY ============ */
.gallery{display:grid; grid-template-columns:repeat(2,1fr); gap:18px}
.gcard{background:var(--card); border:1px solid var(--line); border-radius:var(--r); overflow:hidden; box-shadow:var(--shadow); display:flex; flex-direction:column}
.gcard .imgwrap{background:#fff; display:block; line-height:0; border-bottom:1px solid var(--line); position:relative}
.gcard .imgwrap img{width:100%; display:block; transition:.2s}
.gcard .imgwrap:hover img{opacity:.92}
.gcard .zoom{position:absolute; top:10px; right:10px; background:rgba(20,20,18,.72); color:#fff; font-size:12px; padding:4px 9px; border-radius:7px; opacity:0; transition:.15s}
.gcard .imgwrap:hover .zoom{opacity:1}
.gcard .body{padding:15px 17px 17px}
.gcard .meta{display:flex; align-items:center; gap:8px; margin-bottom:9px; flex-wrap:wrap}
.gcard .topic{font-weight:600; font-size:15.5px; margin:0 0 7px; line-height:1.4}
.gcard .note{font-size:13.5px; color:var(--muted); margin:0; line-height:1.55}

/* ============ PDF CARDS ============ */
.pdfs{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
.pdfcard{display:flex; flex-direction:column; gap:10px; text-decoration:none; color:inherit;
  background:var(--card); border:1px solid var(--line); border-radius:var(--r); padding:18px; box-shadow:var(--shadow); transition:.15s}
.pdfcard:hover{border-color:var(--line2); transform:translateY(-2px)}
.pdfcard .ic{width:40px;height:40px;border-radius:10px; display:grid; place-items:center; font-size:18px; background:var(--c26bg); color:var(--c26d)}
.pdfcard .ttl{font-weight:600; font-size:15px}
.pdfcard .meta{font-size:12.5px; color:var(--muted)}
.pdfcard .go{font-size:12.5px; color:var(--c26d); font-weight:500; margin-top:auto}

@media(max-width:820px){
  .gallery{grid-template-columns:1fr}
  .pdfs{grid-template-columns:1fr 1fr}
}