/* IIE Lab — Showcase shared styles (index + collection pages). */
:root{
  --bg:#0b1020; --bg2:#0e1530; --surface:#141c38; --surface2:#1b2547; --surface3:#212c52;
  --border:#26314f; --text:#eaeefb; --muted:#93a0c0;
  --accent:#5b8cff; --accent2:#22d3aa; --danger:#f2597a; --warn:#f6a94a;
  --shadow:0 18px 40px rgba(0,0,0,.35); --radius:18px;
}
:root[data-theme="light"]{
  --bg:#f3f6fc; --bg2:#eaf0fb; --surface:#ffffff; --surface2:#f5f8ff; --surface3:#eef2fc;
  --border:#e0e7f4; --text:#16203a; --muted:#5b6a88;
  --accent:#2f66ff; --accent2:#0fae87; --shadow:0 16px 36px rgba(30,50,90,.12);
}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#f3f6fc; --bg2:#eaf0fb; --surface:#ffffff; --surface2:#f5f8ff; --surface3:#eef2fc;
    --border:#e0e7f4; --text:#16203a; --muted:#5b6a88; --accent:#2f66ff; --accent2:#0fae87;
    --shadow:0 16px 36px rgba(30,50,90,.12);
  }
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:
    radial-gradient(1100px 600px at 85% -10%, color-mix(in srgb,var(--accent) 16%, transparent), transparent 60%),
    radial-gradient(900px 500px at 0% 5%, color-mix(in srgb,var(--accent2) 12%, transparent), transparent 55%),
    linear-gradient(180deg,var(--bg),var(--bg2));
  color:var(--text); min-height:100vh; line-height:1.55; -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
#bg{position:fixed;inset:0;z-index:0;pointer-events:none}
.wrap{max-width:1780px;margin:0 auto;padding:0 22px 60px;position:relative;z-index:1}
nav{display:flex;align-items:center;gap:14px;padding:10px 0 6px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--text);font-weight:800;font-size:19px;letter-spacing:-.3px}
.brand .mark{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 8px 22px color-mix(in srgb,var(--accent) 45%,transparent)}
.crumb{color:var(--muted);font-size:14px;text-decoration:none}
.crumb:hover{color:var(--text)}
.nav-spacer{flex:1}
.btn{border:1px solid var(--border);background:var(--surface2);color:var(--text);border-radius:10px;
  padding:9px 15px;font-size:14px;font-weight:600;cursor:pointer;text-decoration:none;
  display:inline-flex;align-items:center;gap:7px;transition:.15s;line-height:1.2}
.btn:hover{background:var(--surface3)}
.btn.primary{background:linear-gradient(135deg,var(--accent),#3b6cff);border-color:transparent;color:#fff}
.btn.primary:hover{filter:brightness(1.07)}
.btn.danger{color:var(--danger)}
.btn.sm{padding:6px 10px;font-size:12.5px;border-radius:8px}
.btn svg{width:16px;height:16px}
.theme-btn{width:38px;height:38px;border-radius:10px;border:1px solid var(--border);background:var(--surface);
  color:var(--text);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.15s;flex-shrink:0}
.theme-btn:hover{background:var(--surface2)}
.head{padding:22px 0 8px}
.head h1{font-size:clamp(24px,3.2vw,34px);font-weight:850;letter-spacing:-1px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.head .sub{color:var(--muted);font-size:15px;margin-top:4px;max-width:70ch}

.badge{font-size:10.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;padding:3px 9px;border-radius:999px;display:inline-flex;align-items:center;gap:5px}
.badge.student{color:var(--accent2);background:color-mix(in srgb,var(--accent2) 16%,transparent)}
.badge.group{color:var(--accent);background:color-mix(in srgb,var(--accent) 15%,transparent)}
.badge.project{color:var(--warn);background:color-mix(in srgb,var(--warn) 16%,transparent)}
.badge.lock{color:var(--muted);background:color-mix(in srgb,var(--muted) 16%,transparent)}
.badge.feat{color:#0b1020;background:linear-gradient(135deg,#ffd76a,#ffb02e)}
.badge svg{width:11px;height:11px}

/* ---- collections grid: 5-up at 1920px, scaling down responsively ---- */
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(290px,1fr))}
@media (max-width:640px){.grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}}
.ccard{position:relative;display:flex;flex-direction:column;text-decoration:none;color:var(--text);
  background:color-mix(in srgb,var(--surface) 55%,transparent);backdrop-filter:blur(7px);
  border:3px solid var(--border);border-radius:var(--radius);overflow:hidden;
  transition:transform .18s,border-color .18s,box-shadow .18s}
.ccard:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--card-accent,var(--accent)) 55%,var(--border));box-shadow:var(--shadow)}
.ccard .cover{aspect-ratio:3/2;background:
  linear-gradient(135deg,color-mix(in srgb,var(--card-accent,var(--accent)) 22%,var(--surface2)),var(--surface2));
  display:flex;align-items:center;justify-content:center;color:color-mix(in srgb,var(--card-accent,var(--accent)) 80%,var(--text));position:relative;overflow:hidden}
.ccard .cover img{width:100%;height:100%;object-fit:cover;display:block}
.ccard .cover > svg{width:44px;height:44px;opacity:.85}
.ccard .cover .badges{position:absolute;top:10px;left:10px;right:10px;display:flex;gap:6px;flex-wrap:wrap}
.ccard .body{padding:13px 15px 15px;display:flex;flex-direction:column;gap:4px;flex:1}
.ccard h3{font-size:16px;font-weight:750;letter-spacing:-.2px}
.ccard p{font-size:12.5px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ccard .meta{margin-top:auto;padding-top:6px;font-size:11.5px;color:var(--muted);display:flex;gap:10px;align-items:center}
@media (max-width:640px){
  .ccard{border-width:2px}
  .ccard .body{padding:9px 11px 11px}
  .ccard h3{font-size:13.5px}
  .ccard p{display:none}
}

/* ---- media grid on a collection page ---- */
.mgrid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
@media (max-width:640px){.mgrid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}}
.mcard{position:relative;background:color-mix(in srgb,var(--surface) 55%,transparent);backdrop-filter:blur(7px);
  border:2px solid var(--border);border-radius:14px;overflow:hidden;cursor:pointer;
  transition:transform .15s,border-color .15s,box-shadow .15s;display:flex;flex-direction:column}
.mcard:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 50%,var(--border));box-shadow:var(--shadow)}
.mcard .prev{aspect-ratio:4/3;background:var(--surface2);display:flex;align-items:center;justify-content:center;color:var(--muted);position:relative;overflow:hidden}
.mcard .prev img{width:100%;height:100%;object-fit:cover;display:block}
.mcard .prev svg{width:38px;height:38px;opacity:.7}
.mcard .prev .kind{position:absolute;right:8px;bottom:8px;background:rgba(8,12,28,.62);color:#dfe6ff;
  border-radius:7px;padding:3px 8px;font-size:10.5px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;display:flex;align-items:center;gap:5px}
.mcard .prev .kind svg{width:12px;height:12px;opacity:1}
.mcard .cap{padding:9px 12px 11px}
.mcard .cap h4{font-size:13.5px;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mcard .cap p{font-size:11.5px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mcard .tools{position:absolute;top:8px;right:8px;display:none;gap:5px}
.mcard:hover .tools,.mcard:focus-within .tools{display:flex}
.tools button{width:30px;height:30px;border-radius:8px;border:none;background:rgba(8,12,28,.72);color:#fff;
  cursor:pointer;display:flex;align-items:center;justify-content:center}
.tools button:hover{background:rgba(8,12,28,.92)}
.tools button.del:hover{background:var(--danger)}
.tools button svg{width:15px;height:15px}

.empty{background:color-mix(in srgb,var(--surface) 55%,transparent);border:1px dashed var(--border);border-radius:var(--radius);
  padding:40px 24px;text-align:center;color:var(--muted);font-size:14px}

/* ---- modals ---- */
.overlay{position:fixed;inset:0;background:rgba(4,8,20,.66);backdrop-filter:blur(4px);display:none;
  align-items:flex-start;justify-content:center;padding:6vh 16px 30px;z-index:60;overflow:auto}
.overlay.open{display:flex}
.modal{width:100%;max-width:480px;background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:26px;position:relative}
.modal h2{font-size:18px;margin-bottom:6px}
.modal .mut{color:var(--muted);font-size:13px;margin-bottom:16px}
.modal .x{position:absolute;top:14px;right:14px;width:32px;height:32px;border-radius:9px;border:1px solid var(--border);
  background:var(--surface2);color:var(--muted);cursor:pointer;font-size:15px;line-height:1}
.modal .x:hover{color:var(--text)}
.field{margin-bottom:13px}
.field label{display:block;font-size:12.5px;font-weight:600;color:var(--muted);margin-bottom:6px}
input,select,textarea{width:100%;background:var(--surface2);border:1px solid var(--border);border-radius:10px;
  color:var(--text);padding:11px 13px;font-size:14px;font-family:inherit;outline:none;transition:.15s}
input:focus,select:focus,textarea:focus{border-color:var(--accent)}
.err{color:var(--danger);font-size:13px;margin-top:10px;min-height:1em}

/* PIN entry */
.pinbox{display:flex;gap:10px;justify-content:center;margin:18px 0 4px}
.pinbox input{width:56px;height:64px;text-align:center;font-size:28px;font-weight:800;border-radius:12px;
  border:2px solid var(--border);-moz-appearance:textfield}
.pinbox input::-webkit-outer-spin-button,.pinbox input::-webkit-inner-spin-button{-webkit-appearance:none}
.pinbox input:focus{border-color:var(--accent)}

/* share modal */
.qrwrap{display:flex;flex-direction:column;align-items:center;gap:14px;padding:8px 0}
.qrwrap .qr{background:#fff;padding:14px;border-radius:14px;line-height:0}
.qrwrap .qr img,.qrwrap .qr canvas{display:block;width:200px;height:200px;image-rendering:pixelated}
.linkrow{display:flex;gap:8px;width:100%}
.linkrow input{flex:1;font-size:13px}

/* upload modal */
.dropzone{border:2px dashed var(--border);border-radius:14px;padding:26px 18px;text-align:center;color:var(--muted);
  font-size:13.5px;cursor:pointer;transition:.15s;margin-bottom:14px}
.dropzone:hover,.dropzone.over{border-color:var(--accent);color:var(--text);background:color-mix(in srgb,var(--accent) 7%,transparent)}
.upl-list{display:flex;flex-direction:column;gap:8px;max-height:260px;overflow:auto}
.upl-row{display:flex;align-items:center;gap:10px;background:var(--surface2);border:1px solid var(--border);border-radius:10px;padding:8px 11px;font-size:12.5px}
.upl-row .nm{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.upl-row .st{font-size:11px;color:var(--muted);flex-shrink:0}
.upl-row .st.ok{color:var(--accent2)}
.upl-row .st.err{color:var(--danger)}
.upl-row .bar{height:4px;border-radius:4px;background:var(--surface3);flex-basis:70px;flex-shrink:0;overflow:hidden}
.upl-row .bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .2s}

/* lightbox */
#lb{position:fixed;inset:0;background:rgba(3,6,16,.9);z-index:80;display:none;flex-direction:column}
#lb.open{display:flex}
#lb .lb-top{display:flex;align-items:center;gap:10px;padding:12px 16px;color:#dfe6ff}
#lb .lb-top .ttl{font-weight:700;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#lb .lb-top .by{color:#8fa0c8;font-size:12.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#lb .lb-top .sp{flex:1}
#lb .lb-top button,#lb .lb-top a{width:38px;height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.07);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;text-decoration:none;flex-shrink:0}
#lb .lb-top button:hover,#lb .lb-top a:hover{background:rgba(255,255,255,.16)}
#lb .lb-top svg{width:17px;height:17px}
#lb .lb-main{flex:1;position:relative;display:flex;align-items:center;justify-content:center;min-height:0;padding:0 60px}
@media (max-width:640px){#lb .lb-main{padding:0 8px}}
#lb .lb-stage{width:100%;height:100%;display:flex;align-items:center;justify-content:center}
#lb .lb-stage img{max-width:100%;max-height:100%;object-fit:contain;border-radius:6px}
#lb .lb-stage video{max-width:100%;max-height:100%;border-radius:6px;background:#000}
#lb .lb-stage .v3d{width:100%;height:100%;position:relative}
#lb .lb-stage .v3d canvas{display:block;width:100%;height:100%;touch-action:none}
#lb .lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:64px;border:none;border-radius:12px;
  background:rgba(255,255,255,.08);color:#fff;font-size:22px;cursor:pointer;z-index:2}
#lb .lb-nav:hover{background:rgba(255,255,255,.2)}
#lb .lb-nav.prv{left:8px}#lb .lb-nav.nxt{right:8px}
@media (max-width:640px){#lb .lb-nav{width:34px;height:52px;font-size:18px}}
#lb .lb-hint{text-align:center;color:#67759b;font-size:11.5px;padding:6px 12px 12px}

.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(80px);background:var(--surface);
  border:1px solid var(--border);color:var(--text);padding:11px 18px;border-radius:12px;font-size:13.5px;
  box-shadow:var(--shadow);z-index:100;transition:transform .25s;max-width:90vw}
.toast.show{transform:translateX(-50%) translateY(0)}

footer{margin-top:44px;text-align:center;color:var(--muted);font-size:11px;opacity:.55}
footer a{color:inherit}