:root{
  --bg:#0d1117; --bg2:#151b23; --bg3:#1c2530; --border:#2a3441; --text:#e6edf3; --muted:#8b96a5;
  --accent:#ff5b2e; --accent2:#3b9dff; --green:#2ea043; --orange:#d29922; --red:#f85149;
  --green-bg:rgba(46,160,67,.15); --orange-bg:rgba(210,153,34,.15); --red-bg:rgba(248,81,73,.15);
  --radius:10px; --shadow:0 2px 10px rgba(0,0,0,.4);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0px;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;}
body{min-height:100vh;}
a{color:var(--accent2);}
button, input, select, textarea{font-family:inherit;font-size:14px;color:var(--text);background:var(--bg3);border:1px solid var(--border);border-radius:8px;padding:8px 10px;}
button{cursor:pointer;transition:.15s;}
button:hover{border-color:var(--accent);}
button.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600;}
button.primary:hover{opacity:.9;}
button.ghost{background:transparent;}
button.danger{border-color:var(--red);color:var(--red);}
button.small{padding:4px 8px;font-size:12px;border-radius:6px;}
input[type=checkbox]{width:16px;height:16px;padding:0;}
h1,h2,h3,h4{margin:0 0 8px 0;font-weight:700;}
.hidden{display:none !important;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:6px;}

/* ===== Login / Role Screen ===== */
#loginScreen{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px;}
.login-card{background:var(--bg2);border:1px solid var(--border);border-radius:16px;padding:36px;max-width:440px;width:100%;box-shadow:var(--shadow);text-align:center;}
.login-card h1{font-size:22px;margin-bottom:4px;line-height:1.25;}
.login-card p{color:var(--muted);margin-bottom:24px;}
.login-card.athlete-mode{max-width:480px;}
.login-logo{margin-bottom:12px;}
.login-logo img{max-width:220px;max-height:70px;width:auto;height:auto;}
.login-event-badge{display:inline-block;background:var(--bg3);border:1px solid var(--border);color:var(--accent2);font-weight:700;font-size:14px;padding:5px 14px;border-radius:20px;margin:8px 0 2px;}
.role-btns{display:flex;gap:12px;margin-bottom:18px;}
.role-btns button{flex:1;padding:16px;font-size:15px;border-radius:12px;}
.participant-pick-btn{display:block;width:100%;text-align:left;padding:12px 14px;margin-bottom:6px;border-radius:8px;background:var(--bg3);border:1px solid var(--border);color:var(--text);cursor:pointer;font-size:14px;}
.participant-pick-btn:hover{border-color:var(--accent2);}
#volunteerPicker{margin-top:12px;text-align:left;}
#volunteerPicker select{width:100%;margin-top:8px;}

/* ===== App Shell ===== */
#appShell{display:none;flex-direction:column;min-height:100vh;}
.sticky-header{position:sticky;top:0;z-index:50;}
header.topbar{background:var(--bg2);border-bottom:1px solid var(--border);padding:10px 16px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.brand{font-weight:800;letter-spacing:.5px;color:var(--accent);white-space:nowrap;}
.event-switcher{display:flex;align-items:center;gap:6px;}
.event-switcher select{max-width:220px;}
#globalSearch{flex:1;min-width:140px;max-width:320px;}
.spacer{flex:1;}
.role-badge{padding:4px 10px;border-radius:20px;font-size:12px;font-weight:700;background:var(--accent);color:#fff;}
.role-badge.volunteer{background:var(--accent2);}
nav.tabs{display:flex;gap:2px;background:var(--bg2);border-bottom:1px solid var(--border);overflow-x:auto;padding:0 8px;}
nav.tabs button{background:transparent;border:none;border-bottom:3px solid transparent;border-radius:0;padding:12px 16px;color:var(--muted);font-weight:600;white-space:nowrap;}
nav.tabs button.active{color:var(--text);border-bottom-color:var(--accent);}
main{flex:1;padding:18px;max-width:1400px;width:100%;margin:0 auto;}
footer.statusbar{padding:6px 16px;font-size:11px;color:var(--muted);border-top:1px solid var(--border);display:flex;justify-content:space-between;}

/* ===== Help tooltip ===== */
.help{display:inline-flex;align-items:center;justify-content:center;width:16px;height:16px;border-radius:50%;background:var(--bg3);border:1px solid var(--border);color:var(--muted);font-size:11px;font-weight:700;cursor:help;position:relative;margin-left:6px;vertical-align:middle;}
.help:hover, .help.open{background:var(--accent2);color:#fff;border-color:var(--accent2);}
.help .tip{display:none;position:absolute;z-index:200;top:22px;left:0;background:#0a0f14;border:1px solid var(--accent2);color:var(--text);padding:10px 12px;border-radius:8px;width:240px;font-size:12px;font-weight:400;line-height:1.4;box-shadow:var(--shadow);}
.help:hover .tip, .help.open .tip{display:block;}
.section-title{display:flex;align-items:center;gap:4px;margin-bottom:12px;}

/* ===== Cards / layout ===== */
.card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-bottom:16px;}
.grid{display:grid;gap:14px;}
.grid.cols-4{grid-template-columns:repeat(4,1fr);}
.grid.cols-3{grid-template-columns:repeat(3,1fr);}
.grid.cols-2{grid-template-columns:repeat(2,1fr);}
@media(max-width:900px){.grid.cols-4{grid-template-columns:repeat(2,1fr);} .grid.cols-3{grid-template-columns:repeat(2,1fr);}}
@media(max-width:600px){.grid.cols-4,.grid.cols-3,.grid.cols-2{grid-template-columns:1fr;}}
.stat{background:var(--bg3);border-radius:10px;padding:14px;border:1px solid var(--border);}
.stat .num{font-size:26px;font-weight:800;}
.stat .label{color:var(--muted);font-size:12px;margin-top:2px;}
.stat.green{border-color:var(--green);background:var(--green-bg);}
.stat.orange{border-color:var(--orange);background:var(--orange-bg);}
.stat.red{border-color:var(--red);background:var(--red-bg);}
.badge{display:inline-block;padding:3px 9px;border-radius:20px;font-size:11px;font-weight:700;}
.badge.green{background:var(--green-bg);color:var(--green);}
.badge.orange{background:var(--orange-bg);color:var(--orange);}
.badge.red{background:var(--red-bg);color:var(--red);}
.badge.gray{background:var(--bg3);color:var(--muted);}
.warn-list{display:flex;flex-direction:column;gap:8px;}
.warn-item{padding:10px 12px;border-radius:8px;font-size:13px;display:flex;gap:8px;align-items:flex-start;}
.warn-item.red{background:var(--red-bg);border:1px solid var(--red);}
.warn-item.orange{background:var(--orange-bg);border:1px solid var(--orange);}
.warn-item.green{background:var(--green-bg);border:1px solid var(--green);}

table{width:100%;border-collapse:collapse;font-size:13px;}
th,td{padding:8px 10px;border-bottom:1px solid var(--border);text-align:left;}
th{color:var(--muted);font-weight:600;text-transform:uppercase;font-size:11px;letter-spacing:.3px;}
tr:hover td{background:var(--bg3);}
.table-wrap{overflow-x:auto;}

.toolbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:14px;}
.toolbar .spacer{flex:1;}

.pill-toggle{display:flex;background:var(--bg3);border:1px solid var(--border);border-radius:8px;overflow:hidden;}
.pill-toggle button{border:none;border-radius:0;background:transparent;padding:6px 12px;}
.pill-toggle button.active{background:var(--accent);color:#fff;}

.modal-backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:500;align-items:center;justify-content:center;padding:16px;}
.modal-backdrop.open{display:flex;}
.modal{background:var(--bg2);border:1px solid var(--border);border-radius:14px;padding:22px;max-width:560px;width:100%;max-height:88vh;overflow-y:auto;}
.modal h2{margin-bottom:16px;}
.form-row{margin-bottom:12px;}
.form-row label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px;font-weight:600;}
.form-row input, .form-row select, .form-row textarea{width:100%;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
@media(max-width:520px){.form-grid{grid-template-columns:1fr;}}
.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:18px;}
.checks{display:flex;flex-wrap:wrap;gap:12px;}
.checks label{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text);font-weight:400;}

.sponsor-card{background:var(--bg3);border:1px solid var(--border);border-radius:10px;padding:14px;}
.sponsor-card .name{font-weight:700;font-size:15px;}
.sponsor-card .meta{color:var(--muted);font-size:12px;margin:4px 0 10px;}
.sponsor-card .actions{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px;}

.heat-col{background:var(--bg3);border:1px solid var(--border);border-radius:10px;padding:10px;min-width:200px;flex:0 1 210px;}
.heat-schedule{display:flex;gap:12px;overflow-x:auto;padding-bottom:8px;}
.heat-schedule-wrap{display:flex;flex-wrap:wrap;gap:12px;}
.division-group{margin-bottom:20px;}
.division-group-title{font-weight:700;color:var(--accent2);margin-bottom:8px;display:flex;align-items:center;gap:8px;}
.heat-header{margin-bottom:8px;}
.heat-header-top{display:flex;justify-content:space-between;align-items:center;}
.heat-num{font-weight:700;font-size:13px;color:var(--muted);}
.heat-time{color:var(--accent2);font-size:20px;font-weight:800;margin-top:2px;}
.participant-chip{background:var(--bg2);border:1px solid var(--border);border-radius:7px;padding:6px 8px;margin-bottom:6px;font-size:12px;cursor:grab;display:flex;justify-content:space-between;gap:6px;align-items:center;}
.participant-chip.locked{border-color:var(--accent);}
.participant-chip.dragover{border-color:var(--accent2);}
.participant-chip .tag{font-size:9px;padding:1px 5px;border-radius:8px;background:var(--bg3);color:var(--muted);}
.heat-col.dragover{border-color:var(--accent2);background:rgba(59,157,255,.08);}
.live-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px;}
.live-heat-card{margin:0;}
.live-heat-card.live-racing{border-color:var(--accent2);box-shadow:0 0 0 1px var(--accent2);}
.live-timer{font-size:44px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:1px;}
.checkin-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px;}
.checkin-card{margin:0;padding:14px;}
.checkin-card.checkin-done{border-color:var(--green);}
.checkin-card-top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;}
.checkin-name{font-weight:700;font-size:16px;}
.checkin-meta{color:var(--muted);font-size:12px;margin-top:2px;}
.checkin-btn{padding:10px 16px;font-size:14px;white-space:nowrap;}

.timeline{position:relative;background:var(--bg3);border-radius:8px;border:1px solid var(--border);margin-top:8px;overflow:hidden;}
.timeline .hourline{position:absolute;top:0;bottom:0;border-left:1px dashed rgba(255,255,255,.15);}
.timeline .hourlabel{position:absolute;top:2px;font-size:9px;color:var(--muted);padding-left:3px;}
.timeline .block{position:absolute;border-radius:5px;font-size:10px;color:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:0 4px;white-space:nowrap;}

/* Mobile volunteer view */
#mobileView{max-width:560px;margin:0 auto;}
.mv-hero{background:linear-gradient(135deg,var(--accent),#a53a1a);border-radius:16px;padding:22px;margin-bottom:16px;text-align:center;}
.mv-hero h2{margin:0;font-size:20px;}
.mv-hero .sub{opacity:.85;font-size:13px;margin-top:4px;}
.mv-block{background:var(--bg2);border:1px solid var(--border);border-radius:14px;padding:18px;margin-bottom:14px;display:flex;gap:14px;align-items:center;}
.mv-block .icon{font-size:28px;width:44px;text-align:center;}
.mv-block .big{font-size:20px;font-weight:800;}
.mv-block .lbl{color:var(--muted);font-size:12px;}

@media(max-width:700px){
  nav.tabs{font-size:13px;}
  .grid.cols-4, .grid.cols-3, .grid.cols-2{grid-template-columns:1fr;}
  header.topbar{padding:8px 10px;}
  main{padding:10px;}
}

@media print{
  header.topbar, nav.tabs, footer.statusbar, .no-print{display:none !important;}
  body{background:#fff;color:#000;}
  .card{border:1px solid #999;}
  table th, table td{color:#000;border-color:#999;}
}

.demo-notice{padding:10px 16px;background:#312718;color:#ffe2a8;font-size:13px;text-align:center;}