* { box-sizing: border-box; }
:root{
    --bg:#0b1220;
    --panel:#111a2b;
    --panel-2:#152038;
    --card:#17233d;
    --line:#243558;
    --text:#ebf2ff;
    --muted:#9eb0d0;
    --accent:#48a3ff;
    --danger:#ff5a67;
    --success:#27c27c;
    --warning:#f0ad4e;
}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Inter,Segoe UI,Arial,sans-serif;}
a{color:inherit;text-decoration:none}
.app-shell{display:flex;min-height:100vh}
.sidebar{width:260px;background:#0d1728;border-right:1px solid var(--line);display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.brand{display:flex;gap:14px;padding:22px;border-bottom:1px solid var(--line);align-items:center}
.brand h1{margin:0;font-size:18px}
.brand p{margin:4px 0 0;color:var(--muted);font-size:12px}
.brand-mark{width:48px;height:48px;border-radius:14px;background:linear-gradient(145deg,#3b82f6,#1d4ed8);display:flex;align-items:center;justify-content:center;font-weight:700}
.nav{padding:18px;display:grid;gap:8px}
.nav a{padding:12px 14px;border-radius:12px;color:var(--muted);border:1px solid transparent}
.nav a.active,.nav a:hover{background:var(--panel-2);color:var(--text);border-color:var(--line)}
.sidebar-footer{margin-top:auto;padding:18px;border-top:1px solid var(--line)}
.user-card{background:var(--panel);border:1px solid var(--line);padding:12px;border-radius:12px;display:grid}
.user-card span{color:var(--muted);font-size:13px;margin-top:4px}
.logout-link{display:block;margin-top:12px;padding:10px 12px;border-radius:10px;background:#1b2740;text-align:center}
.content{flex:1;padding:24px}
.page-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:20px}
.page-head h2{margin:0}
.page-head p{margin:6px 0 0;color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 14px;border-radius:12px;border:1px solid var(--line);background:#1c2a45;color:var(--text);cursor:pointer}
.btn:hover{filter:brightness(1.08)}
.btn-primary{background:linear-gradient(145deg,#2b76ff,#1d4ed8);border-color:#2467eb}
.btn-danger{background:#4a1f2b;border-color:#703042}
.btn-ghost{background:transparent}
.btn-small{padding:8px 10px;border-radius:10px;font-size:13px}
.grid{display:grid;gap:16px}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:18px}
.stat{padding:22px;background:linear-gradient(180deg,#15233d,#101a2f)}
.stat .label{color:var(--muted);font-size:13px}
.stat .value{font-size:32px;font-weight:700;margin-top:10px}
.card h3{margin:0 0 10px}
.card p{margin:0;color:var(--muted)}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:var(--panel)}
table{width:100%;border-collapse:collapse}
th,td{padding:14px;border-bottom:1px solid var(--line);text-align:left;font-size:14px;vertical-align:top}
th{background:#10192c;color:#b5c5e0}
tr:last-child td{border-bottom:0}
.badge{display:inline-flex;padding:6px 10px;border-radius:999px;background:#12203a;border:1px solid #26406c;color:#b9d5ff;font-size:12px}
.flash{padding:13px 16px;border-radius:14px;margin-bottom:16px;border:1px solid var(--line)}
.flash-success{background:#10261c;border-color:#224a36;color:#8ef0ba}
.flash-error{background:#2d1318;border-color:#6a2a34;color:#ffc0c9}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.form-grid .full{grid-column:1 / -1}
label{display:grid;gap:8px;font-size:14px;color:#d9e7ff}
input,select,textarea{width:100%;padding:12px 13px;border-radius:12px;border:1px solid var(--line);background:#0f1729;color:var(--text);outline:none}
textarea{min-height:90px;resize:vertical}
input:focus,select:focus,textarea:focus{border-color:#3778ff;box-shadow:0 0 0 3px rgba(55,120,255,.12)}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.login-shell{min-height:100vh;display:grid;place-items:center;padding:22px;background:radial-gradient(circle at top,#163052,#0b1220 50%)}
.login-card{width:min(100%,420px);background:rgba(10,18,32,.88);border:1px solid var(--line);border-radius:22px;padding:24px}
.login-card h1{margin:0 0 8px}
.login-card p{margin:0 0 18px;color:var(--muted)}
.login-foot{margin-top:14px;color:var(--muted);font-size:13px}
.wall-toolbar{display:flex;justify-content:space-between;gap:12px;align-items:end;flex-wrap:wrap;margin-bottom:16px}
.wall-toolbar form{display:flex;gap:10px;flex-wrap:wrap;align-items:end}
.wall-grid{display:grid;gap:12px}
.wall-grid.layout-1{grid-template-columns:1fr}
.wall-grid.layout-4{grid-template-columns:repeat(2,minmax(0,1fr))}
.wall-grid.layout-9{grid-template-columns:repeat(3,minmax(0,1fr))}
.wall-grid.layout-16{grid-template-columns:repeat(4,minmax(0,1fr))}
.wall-tile{background:#090f19;border:1px solid var(--line);border-radius:18px;overflow:hidden;position:relative;min-height:220px}
.wall-head{display:flex;justify-content:space-between;gap:10px;padding:10px 12px;background:#0f1729;border-bottom:1px solid var(--line)}
.wall-head strong{font-size:14px}
.wall-head span{font-size:12px;color:var(--muted)}
.wall-video{width:100%;aspect-ratio:16/9;background:#000;display:block}
.wall-placeholder{display:grid;place-items:center;aspect-ratio:16/9;color:var(--muted);font-size:14px;background:linear-gradient(180deg,#070d17,#05080f)}
.tile-status{position:absolute;bottom:10px;right:10px;font-size:12px;padding:6px 10px;border-radius:999px;background:rgba(8,12,18,.78);border:1px solid rgba(255,255,255,.12)}
.playback-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.code-block{background:#08101c;border:1px solid var(--line);border-radius:16px;padding:14px;overflow:auto;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;white-space:pre-wrap}
.note{padding:14px 16px;border-radius:14px;background:#10192c;border:1px solid var(--line);color:#c5d6f6}
.inline-list{display:flex;flex-wrap:wrap;gap:10px}
.muted{color:var(--muted)}
.kiosk-body{background:#000;padding:0}
.kiosk-shell{padding:12px}
.kiosk-top{display:flex;justify-content:space-between;align-items:center;color:#dce7ff;padding:8px 12px;background:#0d1728;border-bottom:1px solid #1f304f}
.small{font-size:12px}
@media (max-width: 1100px){
    .grid-3,.grid-4,.playback-grid,.form-grid{grid-template-columns:1fr}
    .sidebar{position:fixed;left:-280px;transition:.2s}
}