:root{
  --bg:#f6f7f9; --surface:#ffffff; --surface-2:#eef0f4; --text:#151a23; --muted:#5f6878;
  --border:#dde1e8; --accent:#2f6bff; --accent-soft:#e3ebff; --accent-ink:#ffffff;
  --ok:#14804a; --danger:#c4352b; --shadow:0 1px 2px rgba(20,26,35,.06),0 4px 16px rgba(20,26,35,.06);
  --overlay:rgba(10,12,16,.96);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0f1115; --surface:#171a21; --surface-2:#1f232c; --text:#e8ebf1; --muted:#9aa3b2;
    --border:#2a2f3a; --accent:#6d97ff; --accent-soft:#1d2a4a; --accent-ink:#0b0f18;
    --ok:#4cc38a; --danger:#ff7b72; --shadow:0 1px 2px rgba(0,0,0,.3),0 4px 16px rgba(0,0,0,.25);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0f1115; --surface:#171a21; --surface-2:#1f232c; --text:#e8ebf1; --muted:#9aa3b2;
  --border:#2a2f3a; --accent:#6d97ff; --accent-soft:#1d2a4a; --accent-ink:#0b0f18;
  --ok:#4cc38a; --danger:#ff7b72; --shadow:0 1px 2px rgba(0,0,0,.3),0 4px 16px rgba(0,0,0,.25);
    color-scheme:dark;
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--text);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased;padding-bottom:88px}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
.wrap{max-width:1280px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:21;background:var(--bg)}
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
header.top .wrap{display:flex;align-items:center;gap:12px;min-height:60px;flex-wrap:wrap;padding-top:8px;padding-bottom:8px}
.brand{display:flex;align-items:center;gap:10px;margin-right:auto;min-width:0}
.logo{width:34px;height:34px;border-radius:10px;background:var(--accent);display:grid;place-items:center;flex:none}
.logo svg{width:20px;height:20px;stroke:var(--accent-ink)}
.brand b{font-size:17px;letter-spacing:-.01em;display:block;line-height:1.2}
.brand small{color:var(--muted);font-size:12.5px;display:block;line-height:1.2}
.btn{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--border);background:var(--surface);border-radius:10px;padding:8px 13px;font-weight:550;font-size:14px;white-space:nowrap;transition:background .15s,border-color .15s}
.btn:hover{background:var(--surface-2)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.06)}
.btn.ghost{background:transparent;border-color:transparent}
.btn.ghost:hover{background:var(--surface-2)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn svg{width:17px;height:17px;flex:none}
.hidden{display:none!important}

/* empty / drop */
.drop{margin:28px 0;border:2px dashed var(--border);border-radius:18px;background:var(--surface);padding:48px 20px;text-align:center}
.drop h1{font-size:24px;margin:0 0 6px;letter-spacing:-.02em;text-wrap:balance}
.drop p.lead{color:var(--muted);margin:0 auto 22px;max-width:560px;text-wrap:pretty}
.drop .acts{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;max-width:760px;margin:32px auto 0;text-align:left}
.step{background:var(--surface-2);border-radius:12px;padding:14px}
.step b{display:block;font-size:14px}
.step span{color:var(--muted);font-size:13px}
.step i{font-style:normal;display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:700;margin-bottom:6px}
@media (max-width:640px){.steps{grid-template-columns:1fr}.drop{padding:32px 16px}}
.dragging .drop-overlay{display:grid}
.drop-overlay{display:none;position:fixed;inset:0;z-index:60;background:color-mix(in srgb,var(--accent) 18%,transparent);place-items:center;pointer-events:none}
.drop-overlay div{background:var(--surface);border:2px dashed var(--accent);border-radius:16px;padding:28px 36px;font-weight:600;box-shadow:var(--shadow)}

/* status */
.status{display:flex;align-items:center;gap:12px;margin:16px 0 0;padding:12px 14px;background:var(--surface);border:1px solid var(--border);border-radius:12px;font-size:14px}
.status .txt{flex:1;min-width:0}
.status .txt small{color:var(--muted)}
.bar{height:6px;background:var(--surface-2);border-radius:99px;overflow:hidden;margin-top:6px}
.bar i{display:block;height:100%;width:0;background:var(--accent);border-radius:99px;transition:width .25s}
.spin{width:18px;height:18px;border-radius:50%;border:2.5px solid var(--accent-soft);border-top-color:var(--accent);animation:sp 0.8s linear infinite;flex:none}
@keyframes sp{to{transform:rotate(360deg)}}
.dot-ok{width:18px;height:18px;border-radius:50%;background:var(--ok);flex:none;display:grid;place-items:center}
.dot-ok svg{width:12px;height:12px;stroke:#fff}

/* people */
.panel{margin-top:16px;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:14px}
.panel-h{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.panel-h h2{font-size:16px;margin:0;letter-spacing:-.01em}
.panel-h .sub{color:var(--muted);font-size:13px}
.panel-h .sp{flex:1}
.people{display:flex;flex-wrap:wrap;gap:6px 4px;max-height:236px;overflow:hidden;position:relative}
.people.open{max-height:none}
.person{border:0;background:transparent;padding:4px;border-radius:12px;width:84px;display:flex;flex-direction:column;align-items:center;gap:4px}
.person:hover{background:var(--surface-2)}
.person .av{position:relative;width:64px;height:64px}
.person img{width:64px;height:64px;border-radius:50%;object-fit:cover;display:block;background:var(--surface-2);outline:3px solid transparent;outline-offset:2px;transition:outline-color .15s}
.person.on img{outline-color:var(--accent)}
.person .cnt{position:absolute;right:-4px;bottom:-2px;background:var(--surface);border:1px solid var(--border);border-radius:99px;font-size:11px;font-weight:650;padding:0 6px;line-height:18px;font-variant-numeric:tabular-nums}
.person.on .cnt{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.person .nm{font-size:12px;max-width:80px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted)}
.person.named .nm{color:var(--text);font-weight:550}
.person.q img{outline-color:var(--ok)}
.more{margin-top:8px}
.seg{display:inline-flex;background:var(--surface-2);border-radius:10px;padding:3px}
.seg button{border:0;background:transparent;border-radius:8px;padding:5px 10px;font-size:13px;font-weight:550;color:var(--muted)}
.seg button.on{background:var(--surface);color:var(--text);box-shadow:var(--shadow)}
details.tune{position:relative}
details.tune summary{list-style:none}
details.tune summary::-webkit-details-marker{display:none}
.tune-box{position:absolute;right:0;top:calc(100% + 6px);z-index:15;width:300px;max-width:calc(100vw - 32px);background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:14px;box-shadow:var(--shadow);font-size:13.5px}
.tune-box label{display:block;font-weight:600;margin-bottom:6px}
.tune-box input[type=range]{width:100%;accent-color:var(--accent)}
.tune-box .ends{display:flex;justify-content:space-between;color:var(--muted);font-size:12px}
.tune-box .row{display:flex;gap:8px;align-items:flex-start;margin-top:12px}
.tune-box .row input{margin-top:3px;accent-color:var(--accent)}
.tune-box p{color:var(--muted);margin:4px 0 0;font-size:12.5px}

/* view header + grid */
.viewbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:22px 0 12px}
.viewbar h2{margin:0;font-size:18px;letter-spacing:-.01em;display:flex;align-items:center;gap:10px;min-width:0}
.viewbar h2 img{width:36px;height:36px;border-radius:50%;object-fit:cover}
.viewbar .count{color:var(--muted);font-size:14px;font-weight:500}
.viewbar .sp{flex:1}
.name-in{border:1px solid var(--border);background:var(--surface);border-radius:9px;padding:6px 10px;font-size:14px;width:190px;max-width:100%}
.name-in:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:transparent}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{border:1px solid var(--border);background:var(--surface);border-radius:99px;padding:5px 12px;font-size:13px;font-weight:550}
.chip.on{background:var(--text);color:var(--bg);border-color:var(--text)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:6px}
@media (max-width:640px){.grid{grid-template-columns:repeat(3,1fr);gap:3px}}
.tile{position:relative;aspect-ratio:1;background:var(--surface-2);border-radius:8px;overflow:hidden;cursor:zoom-in}
.tile img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .15s}
.tile.sel img{transform:scale(.88);border-radius:6px}
.tile.sel{background:var(--accent-soft)}
.selecting .tile{cursor:pointer}
.tile .ck{position:absolute;top:6px;left:6px;width:26px;height:26px;border-radius:50%;border:2px solid #fff;background:rgba(0,0,0,.25);display:grid;place-items:center;padding:0;opacity:0;transition:opacity .15s;box-shadow:0 1px 4px rgba(0,0,0,.3)}
.tile .ck svg{width:14px;height:14px;stroke:#fff;opacity:0}
.tile:hover .ck,.selecting .tile .ck,.tile.sel .ck{opacity:1}
@media (hover:none){.tile .ck{opacity:1}}
.tile.sel .ck{background:var(--accent);border-color:var(--accent)}
.tile.sel .ck svg{opacity:1}
.tile .badge{position:absolute;right:6px;bottom:6px;background:rgba(0,0,0,.62);color:#fff;font-size:11.5px;font-weight:650;border-radius:99px;padding:1px 8px;font-variant-numeric:tabular-nums}
.tile .pend{position:absolute;right:6px;top:6px}
.empty-view{padding:40px 16px;text-align:center;color:var(--muted);background:var(--surface);border:1px dashed var(--border);border-radius:14px}

/* selection bar */
.selbar{position:fixed;left:50%;bottom:calc(16px + env(safe-area-inset-bottom,0px));transform:translate(-50%,140%);z-index:30;background:var(--text);color:var(--bg);border-radius:14px;padding:8px 8px 8px 16px;display:flex;align-items:center;gap:8px;box-shadow:0 8px 30px rgba(0,0,0,.25);transition:transform .2s;max-width:calc(100vw - 32px)}
.selbar.show{transform:translate(-50%,0)}
.selbar b{font-variant-numeric:tabular-nums;white-space:nowrap}
.selbar .btn{border-color:transparent}
.selbar .btn.ghost{color:var(--bg)}
.selbar .btn.ghost:hover{background:color-mix(in srgb,var(--bg) 14%,transparent)}

/* lightbox */
.lb{position:fixed;inset:0;z-index:50;background:var(--overlay);display:flex;flex-direction:column;color:#fff;padding:env(safe-area-inset-top,0px) env(safe-area-inset-right,0px) env(safe-area-inset-bottom,0px) env(safe-area-inset-left,0px)}
.lb-top{display:flex;align-items:center;gap:8px;padding:10px 12px}
.lb-top .nm{flex:1;min-width:0;font-size:14px;opacity:.85;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lb .btn{background:rgba(255,255,255,.1);border-color:transparent;color:#fff}
.lb .btn:hover{background:rgba(255,255,255,.2)}
.lb .btn.on{background:var(--accent);color:var(--accent-ink)}
.lb-main{flex:1;position:relative;min-height:0}
.lb-main img{position:absolute;inset:0;margin:auto;max-width:calc(100% - 120px);max-height:100%;object-fit:contain;user-select:none}
@media (max-width:640px){.lb-main img{max-width:100%}}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;border:0;background:rgba(255,255,255,.12);color:#fff;display:grid;place-items:center}
.lb-nav:hover{background:rgba(255,255,255,.24)}
.lb-nav svg{width:22px;height:22px}
.lb-nav.p{left:8px}.lb-nav.n{right:8px}
@media (max-width:640px){.lb-nav{background:rgba(0,0,0,.4)}}
.lb-nav{z-index:1}
.lb-faces{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;padding:10px 12px 16px;min-height:20px}
.lb-faces button{border:0;padding:0;background:transparent;display:flex;flex-direction:column;align-items:center;gap:2px;color:#fff;font-size:11px;width:56px}
.lb-faces img{width:44px;height:44px;border-radius:50%;object-fit:cover;outline:2px solid rgba(255,255,255,.35)}
.lb-faces button:hover img{outline-color:#fff}
.lb-faces span{max-width:56px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;opacity:.85}

.toast{position:fixed;left:50%;top:76px;transform:translateX(-50%);z-index:70;background:var(--text);color:var(--bg);padding:10px 16px;border-radius:10px;font-size:14px;box-shadow:var(--shadow);max-width:calc(100vw - 32px);opacity:0;pointer-events:none;transition:opacity .2s}
.toast.show{opacity:1}
footer{color:var(--muted);font-size:12.5px;text-align:center;padding:28px 16px 8px}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ---------- bổ sung cho bản nhiều sự kiện + admin ---------- */
[hidden]{display:none!important}
a{color:inherit}
.brand{text-decoration:none}
.tag{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;background:var(--accent-soft);color:var(--accent);border-radius:6px;padding:2px 7px;margin-left:6px;vertical-align:2px}
.page-h{display:flex;align-items:flex-end;gap:12px;flex-wrap:wrap;margin:26px 0 16px}
.page-h h1{font-size:24px;letter-spacing:-.02em;margin:0;text-wrap:balance}
.page-h p{margin:2px 0 0;color:var(--muted)}
.page-h .sp{flex:1}
.newev{display:flex;gap:8px;flex-wrap:wrap}
.input{border:1px solid var(--border);background:var(--surface);border-radius:10px;padding:8px 12px;font-size:14px;min-width:0}
.input:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:transparent}
.events{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.ev-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;display:flex;flex-direction:column}
.ev-card a.cover{display:block;aspect-ratio:16/10;background:var(--surface-2);position:relative}
.ev-card a.cover img{width:100%;height:100%;object-fit:cover;display:block}
.ev-card a.cover .ph{position:absolute;inset:0;display:grid;place-items:center;color:var(--muted);font-size:13px}
.ev-card .meta{padding:12px 14px 14px;display:flex;flex-direction:column;gap:2px}
.ev-card .meta b{font-size:15.5px;line-height:1.35}
.ev-card .meta span{color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}
.ev-card .acts{display:flex;gap:4px;flex-wrap:wrap;padding:0 8px 10px}
.ev-card .acts .btn{padding:5px 9px;font-size:13px}
.btn.danger{color:var(--danger)}
.btn.danger-fill{background:var(--danger);border-color:var(--danger);color:#fff}
.empty-events{padding:48px 16px;text-align:center;color:var(--muted);background:var(--surface);border:1px dashed var(--border);border-radius:14px}
.ev-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:20px 0 4px}
.ev-head h1{font-size:22px;letter-spacing:-.02em;margin:0;min-width:0;overflow-wrap:anywhere}
.ev-head .sp{flex:1}
.back{display:inline-flex;align-items:center;gap:4px;color:var(--muted);text-decoration:none;font-size:14px;font-weight:550;margin-top:18px}
.back:hover{color:var(--text)}
.usage{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);flex-wrap:wrap}
.usage .bar{width:160px;margin:0}
.login{max-width:380px;margin:60px auto;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:24px;display:flex;flex-direction:column;gap:12px}
.login h1{font-size:20px;margin:0}
.login p{margin:0;color:var(--muted);font-size:14px}
.login .err{color:var(--danger);font-size:13.5px;min-height:1em}
.modal-bg{position:fixed;inset:0;z-index:80;background:rgba(10,12,16,.5);display:grid;place-items:center;padding:16px}
.modal{background:var(--surface);color:var(--text);border-radius:14px;padding:20px;width:100%;max-width:420px;box-shadow:0 20px 60px rgba(0,0,0,.3);display:flex;flex-direction:column;gap:12px}
.modal h2{font-size:17px;margin:0}
.modal p{margin:0;color:var(--muted);font-size:14px}
.modal .row{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap}
.status .err{color:var(--danger)}
.lb .btn.danger{color:#ffb4ac}