/* ============================================================
   Canvas360 — Project Page
   ============================================================ */
:root {
  --bg: #f7f8fb;
  --bg-soft: #ffffff;
  --ink: #10131a;
  --ink-soft: #3c4557;
  --muted: #6b7488;
  --line: #e6e9f0;
  --brand: #6d5efc;
  --brand-2: #22b8cf;
  --brand-3: #ff7a59;
  --best: #ff5a5f;
  --second: #ff9f43;
  --shadow: 0 12px 40px -18px rgba(23, 28, 51, .35);
  --shadow-lg: 0 30px 80px -30px rgba(23, 28, 51, .45);
  --radius: 18px;
  --maxw: 1180px;
  --serif: "Newsreader", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--brand); text-decoration: none; transition: color .2s; }
a:hover { color: var(--brand-3); }
img { max-width: 100%; display: block; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 860px; margin-left: auto; margin-right: auto; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(14px);
  background: rgba(247, 248, 251, .72);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.scrolled { border-color: var(--line); background: rgba(247,248,251,.9); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.nav-logo { font-weight: 700; letter-spacing: -.02em; font-size: 1.12rem; color: var(--ink); display:flex; align-items:center; gap:.5rem; }
.nav-logo .dot { width: 12px; height: 12px; border-radius: 50%; background: linear-gradient(135deg, var(--brand), var(--brand-2)); box-shadow: 0 0 0 4px rgba(109,94,252,.15); }
.nav-links { display: flex; gap: 26px; font-size: .93rem; font-weight: 500; }
.nav-links a { color: var(--ink-soft); }
.nav-links a:hover { color: var(--brand); }
@media (max-width: 780px){ .nav-links { display:none; } }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 70px 0 40px;
  text-align: center;
  overflow: hidden;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background: linear-gradient(180deg, #eef0ff 0%, #f7f8fb 48%, #f3f6ff 100%);
}
#ripple-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
}
#bubble-container {
  position: absolute; inset: 0;
  z-index: 1;
  pointer-events: none;
}
#bubble-container canvas { pointer-events: auto; }
.hero-inner { position: relative; z-index: 2; }
@media (max-width: 900px){ #bubble-container { display:none; } }
.badge {
  display:inline-block; font-size:.8rem; font-weight:600; letter-spacing:.04em;
  text-transform: uppercase; color: var(--brand);
  background: rgba(109,94,252,.1); border:1px solid rgba(109,94,252,.2);
  padding: 5px 14px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.1rem, 5vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: -.02em;
  margin: 0 auto 8px;
  max-width: 40ch;
}
.hero .method-name {
  background: linear-gradient(120deg, var(--brand), var(--brand-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-style: italic;
  padding-right: .18em;
}
.hero .subtitle { color: var(--muted); font-size: 1.06rem; max-width: 88ch; margin: 18px auto 0; }

/* authors */
.authors { margin: 30px auto 6px; font-size: 1.06rem; color: var(--ink-soft); max-width: 780px; }
.authors a { color: var(--ink); font-weight: 600; }
.authors sup { color: var(--brand); font-weight: 600; }
.affil { color: var(--muted); font-size: .95rem; margin: 6px auto 0; max-width: 760px; }
.notes { color: var(--muted); font-size: .85rem; margin-top: 8px; }

/* buttons */
.btns { display:flex; flex-wrap:wrap; gap: 12px; justify-content:center; margin: 30px 0 6px; }
.btn {
  display:inline-flex; align-items:center; gap:9px;
  padding: 11px 22px; border-radius: 999px; font-weight: 600; font-size: .95rem;
  background: var(--ink); color: #fff; border: 1px solid var(--ink);
  transition: transform .18s, box-shadow .2s, background .2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); color:#fff; }
.btn.ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { color: var(--brand); border-color: var(--brand); }
.btn svg { width: 18px; height: 18px; }

/* ---------- Sections ---------- */
section { padding: 62px 0; }
.section-tag { text-align:center; color: var(--brand); font-weight:700; font-size:.82rem; letter-spacing:.12em; text-transform:uppercase; margin-bottom: 10px; }
.section-title {
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(1.7rem, 3.6vw, 2.5rem); line-height:1.15; letter-spacing:-.02em;
  text-align:center; margin: 0 auto 14px; max-width: 40ch;
}
.section-lead { text-align:center; color: var(--muted); max-width: 90ch; margin: 0 auto 40px; }
.alt { background: var(--bg-soft); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }

/* teaser */
.teaser { margin-top: 30px; }
.figure {
  background:#fff; border:1px solid var(--line); border-radius: var(--radius);
  padding: 12px; box-shadow: var(--shadow); overflow:hidden;
}
.figure img { border-radius: 10px; cursor: zoom-in; width:100%; }
.figure figcaption, .cap { color: var(--muted); font-size: .9rem; margin-top: 14px; padding: 0 8px 4px; line-height:1.55; }
.cap b, figcaption b { color: var(--ink-soft); }

/* abstract */
.abstract-card {
  background:#fff; border:1px solid var(--line); border-radius: var(--radius);
  padding: 38px 42px; box-shadow: var(--shadow);
}
.abstract-card p { margin: 0; color: var(--ink-soft); font-size: 1.05rem; }
.abstract-card p + p { margin-top: 16px; }

/* highlights */
.grid { display:grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px){ .grid-3 { grid-template-columns:1fr; } .grid-2{ grid-template-columns:1fr; } }
.card {
  background:#fff; border:1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: transform .22s, box-shadow .22s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card .ic { width: 46px; height: 46px; border-radius: 12px; display:grid; place-items:center; margin-bottom:16px;
  background: linear-gradient(135deg, rgba(109,94,252,.14), rgba(34,184,207,.14)); color: var(--brand); }
.card .ic svg { width: 24px; height: 24px; }
.card h3 { margin: 0 0 8px; font-size: 1.15rem; letter-spacing:-.01em; }
.card p { margin: 0; color: var(--muted); font-size: .98rem; }

/* method steps */
.steps { display:grid; gap: 18px; margin-top: 36px; }

/* method two-column: pipeline + compact contribution list */
.method-split { display:grid; grid-template-columns: 1.9fr 1fr; gap: 30px; align-items:center; margin-top: 34px; }
@media (max-width: 940px){ .method-split { grid-template-columns:1fr; gap: 22px; } }
.contrib-block { background:#fff; border:1px solid var(--line); border-radius: 16px; padding: 22px 24px; }
.contrib-block .row { display:grid; grid-template-columns: 30px 1fr; gap: 12px; align-items:start; }
.contrib-block .row + .row { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); }
.contrib-block .cn {
  width: 26px; height: 26px; border-radius: 8px; display:grid; place-items:center;
  font-family: var(--serif); font-size: .92rem; color:#fff; font-weight:500;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
}
.contrib-block h3 { margin: 0 0 2px; font-size: .96rem; letter-spacing:-.01em; }
.contrib-block p { margin: 0; color: var(--muted); font-size: .84rem; line-height:1.45; }

.step {
  display:grid; grid-template-columns: 64px 1fr; gap: 22px; align-items:start;
  background:#fff; border:1px solid var(--line); border-radius: var(--radius); padding: 26px 28px;
  transition: box-shadow .2s;
}
.step:hover { box-shadow: var(--shadow); }
.step .num {
  width: 56px; height: 56px; border-radius: 14px; display:grid; place-items:center;
  font-family: var(--serif); font-size: 1.5rem; color:#fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
}
.step h3 { margin: 2px 0 6px; font-size: 1.18rem; }
.step p { margin: 0; color: var(--ink-soft); font-size:.99rem; }
.step p .k { color: var(--brand); font-weight:600; }

/* stat row */
.stats { display:grid; grid-template-columns: repeat(4,1fr); gap: 18px; margin-top: 8px; }
@media (max-width:780px){ .stats{ grid-template-columns: repeat(2,1fr);} }
.stat { text-align:center; background:#fff; border:1px solid var(--line); border-radius: var(--radius); padding: 26px 16px; }
.stat .n { font-family: var(--serif); font-size: 2.2rem; line-height:1; color: var(--ink);
  background: linear-gradient(120deg,var(--brand),var(--brand-2)); -webkit-background-clip:text; background-clip:text; color:transparent; }
.stat .l { color: var(--muted); font-size: .9rem; margin-top: 8px; }

/* tables */
.table-wrap { overflow-x:auto; background:#fff; border:1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
table { border-collapse: collapse; width:100%; font-size:.92rem; }
caption { caption-side: top; text-align:left; padding: 18px 22px 4px; color: var(--muted); font-size:.9rem; }
th, td { padding: 11px 14px; text-align:center; white-space:nowrap; }
thead th { border-bottom: 2px solid var(--line); color: var(--ink-soft); font-weight:600; font-size:.86rem; }
tbody td:first-child, tbody th:first-child { text-align:left; font-weight:500; }
tbody tr { border-top: 1px solid var(--line); }
tbody tr:hover { background: rgba(109,94,252,.035); }
tr.ours { background: rgba(109,94,252,.07); font-weight:600; }
tr.ours:hover { background: rgba(109,94,252,.1); }
td.best { background: rgba(255,90,95,.16); border-radius:6px; font-weight:700; color:#c0272d; }
td.second { background: rgba(255,159,67,.18); font-weight:600; color:#c1741a; }
.legend { display:flex; gap:18px; justify-content:center; font-size:.82rem; color:var(--muted); margin-top:14px; flex-wrap:wrap; }
.legend span { display:inline-flex; align-items:center; gap:7px; }
.legend i { width:14px; height:14px; border-radius:4px; display:inline-block; }

/* image blocks spacing */
.stack > * + * { margin-top: 34px; }

/* bibtex */
.bibtex { background: #0f1220; color: #d7dcff; border-radius: var(--radius); padding: 26px 28px; overflow-x:auto; box-shadow: var(--shadow-lg); position:relative; }
.bibtex pre { margin:0; font-family: "JetBrains Mono", ui-monospace, monospace; font-size:.86rem; line-height:1.7; }
.bibtex .k { color:#8b9cff; } .bibtex .s { color:#7ee0c0; }
.copy-btn { position:absolute; top:16px; right:16px; background: rgba(255,255,255,.08); color:#d7dcff; border:1px solid rgba(255,255,255,.15); border-radius:8px; padding:6px 12px; font-size:.8rem; cursor:pointer; transition: background .2s; }
.copy-btn:hover { background: rgba(255,255,255,.16); }

/* footer */
footer { padding: 46px 0; text-align:center; color: var(--muted); font-size:.9rem; border-top:1px solid var(--line); background:var(--bg-soft); }
footer a { color: var(--ink-soft); }

/* reveal animation */
.reveal { opacity:0; transform: translateY(24px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity:1; transform:none; }

/* lightbox */
.lb { position:fixed; inset:0; background: rgba(10,12,20,.92); z-index:100; display:none; align-items:center; justify-content:center; padding:30px; cursor: zoom-out; }
.lb.open { display:flex; }
.lb img { max-width:96vw; max-height:92vh; border-radius:8px; box-shadow: var(--shadow-lg); }
.lb-close { position:absolute; top:22px; right:28px; color:#fff; font-size:2rem; cursor:pointer; line-height:1; opacity:.8; }
.lb-close:hover { opacity:1; }

/* 360 panorama viewer */
.pano-viewer { position:fixed; inset:0; background:rgba(10,12,20,.9); z-index:110; display:none; align-items:center; justify-content:center; padding:30px; }
.pano-viewer.open { display:flex; }
#pano-canvas-holder { position:relative; width:min(920px, 92vw); height:min(520px, 70vh); border-radius:16px; overflow:hidden; box-shadow: var(--shadow-lg); }
#pano-canvas-holder canvas { display:block; width:100% !important; height:100% !important; cursor:grab; }
#pano-canvas-holder canvas:active { cursor:grabbing; }
.pano-close { position:absolute; top:18px; right:26px; color:#fff; font-size:2.4rem; line-height:1; cursor:pointer; opacity:.85; z-index:2; text-shadow:0 1px 6px rgba(0,0,0,.6); }
.pano-close:hover { opacity:1; }
.pano-hint {
  position:absolute; bottom:22px; left:50%; transform:translateX(-50%);
  display:flex; align-items:center; gap:9px; z-index:2;
  color:#fff; font-size:.9rem; font-weight:500;
  background:rgba(20,24,40,.55); border:1px solid rgba(255,255,255,.18);
  backdrop-filter:blur(8px); padding:10px 18px; border-radius:999px;
  transition:opacity .5s ease; pointer-events:none;
}
.pano-hint svg { width:18px; height:18px; }
.pano-hint.hidden { opacity:0; }

/* pill tabs */
.tabs { display:flex; gap:10px; justify-content:center; flex-wrap:wrap; margin-bottom: 30px; }
.tab { padding: 9px 20px; border-radius:999px; border:1px solid var(--line); background:#fff; color:var(--ink-soft); font-weight:600; font-size:.92rem; cursor:pointer; transition: all .2s; }
.tab.active, .tab:hover { background: var(--ink); color:#fff; border-color:var(--ink); }
.panel { display:none; } .panel.active { display:block; animation: fade .4s; }
@keyframes fade { from {opacity:0; transform: translateY(8px);} to {opacity:1;} }

/* dataset gallery carousel */
.gallery { background:#fff; border:1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow:hidden; }
.gallery .track { display:none; }
.gallery .track.active { display:block; animation: fade .35s; }
.pairs { display:grid; grid-template-columns: 1fr 1fr; gap: 2px; background: var(--line); }
@media (max-width: 720px){ .pairs { grid-template-columns:1fr; } }
.pair { background:#fff; padding: 14px; }
.pair .tag { font-size:.74rem; font-weight:700; letter-spacing:.08em; text-transform:uppercase; color: var(--muted); margin-bottom:10px; display:flex; align-items:center; gap:7px; }
.pair .tag .d { width:8px; height:8px; border-radius:50%; }
.pair.in .tag .d { background: var(--muted); }
.pair.out .tag .d { background: var(--brand); }
.pair img { border-radius:10px; width:100%; cursor: zoom-in; }
.gallery .bar { display:flex; align-items:center; justify-content:space-between; gap:14px; padding: 16px 20px; border-top:1px solid var(--line); }
.gallery .prompt { color: var(--ink-soft); font-size:.92rem; line-height:1.5; flex:1; }
.gallery .prompt b { color: var(--brand); font-weight:600; }
.gallery .navbtns { display:flex; align-items:center; gap:10px; flex-shrink:0; }
.gallery .navbtns button {
  width:38px; height:38px; border-radius:50%; border:1px solid var(--line); background:#fff; color: var(--ink);
  cursor:pointer; display:grid; place-items:center; transition: all .2s;
}
.gallery .navbtns button:hover { background: var(--ink); color:#fff; border-color:var(--ink); }
.gallery .navbtns button svg { width:18px; height:18px; }
.gallery .count { font-size:.85rem; color: var(--muted); font-variant-numeric: tabular-nums; min-width: 40px; text-align:center; }