:root{
    --bg:#eef3fb;
    --panel:#ffffff;
    --panel-soft:#f8fafc;
    --text:#172033;
    --muted:#667085;
    --primary:#2563eb;
    --primary-dark:#1d4ed8;
    --danger:#dc2626;
    --ok:#059669;
    --line:#dbe3ef;
    --shadow:0 18px 45px rgba(15,23,42,.08);
    --sidebar:#0f172a;
    --sidebar-2:#111c33;
}
*{box-sizing:border-box}
html{height:100%}
body{min-height:100%;margin:0;font-family:Inter,Segoe UI,Arial,Helvetica,sans-serif;background:radial-gradient(circle at top left,#dbeafe 0,#eef3fb 38%,#f8fafc 100%);color:var(--text)}
a{color:var(--primary);text-decoration:none}
.app-shell{min-height:100vh;display:grid;grid-template-columns:292px 1fr}
.sidebar{position:sticky;top:0;height:100vh;background:linear-gradient(180deg,var(--sidebar),var(--sidebar-2));color:white;padding:22px 18px;display:flex;flex-direction:column;gap:22px;box-shadow:10px 0 30px rgba(15,23,42,.18);z-index:5}
.brandbox{display:flex;align-items:center;gap:12px;padding:8px 6px 18px;border-bottom:1px solid rgba(255,255,255,.1)}
.brandmark{width:44px;height:44px;border-radius:16px;background:linear-gradient(135deg,#60a5fa,#2563eb);display:grid;place-items:center;font-weight:900;font-size:22px;box-shadow:0 10px 24px rgba(37,99,235,.35)}
.brand{font-weight:800;letter-spacing:.2px}.brand-sub{font-size:12px;color:#aab6cc;margin-top:2px}
.side-nav{display:flex;flex-direction:column;gap:8px;overflow:auto;padding-right:3px}
.side-nav a{display:flex;align-items:center;gap:12px;color:#d7deed;padding:12px 13px;border-radius:16px;transition:.18s ease;background:transparent;border:1px solid transparent}
.side-nav a span{width:28px;height:28px;display:grid;place-items:center;background:rgba(255,255,255,.08);border-radius:10px}
.side-nav a:hover,.side-nav a.active{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.12);transform:translateX(3px)}
.side-nav a.active span{background:#2563eb}
.userbox{margin-top:auto;display:flex;align-items:center;gap:10px;padding:12px;border-radius:18px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.1)}
.avatar{width:40px;height:40px;border-radius:50%;background:#2563eb;display:grid;place-items:center;font-weight:800}.user-meta{min-width:0;flex:1}.user-meta b{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-meta span{font-size:12px;color:#aab6cc}.logout{color:white;background:rgba(255,255,255,.1);border-radius:12px;padding:8px 10px}
.content{min-width:0;padding:28px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:11px;color:var(--muted);font-weight:800}.page-title{font-size:28px;font-weight:850;color:#101828}.page-card{background:rgba(255,255,255,.68);backdrop-filter:blur(10px);border:1px solid rgba(219,227,239,.8);border-radius:28px;padding:24px;box-shadow:var(--shadow);min-height:calc(100vh - 112px)}
h1{margin:0 0 8px;font-size:30px;letter-spacing:-.03em}h2{margin:0 0 14px;font-size:19px}p{line-height:1.55}.muted{color:var(--muted)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:20px;margin:16px 0;box-shadow:0 10px 28px rgba(15,23,42,.05)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px}.module{display:block;background:linear-gradient(180deg,#fff,#f8fafc);border:1px solid var(--line);border-radius:24px;padding:24px;color:var(--text);box-shadow:0 12px 26px rgba(15,23,42,.06);transition:.18s ease}.module:hover{transform:translateY(-4px);box-shadow:0 20px 38px rgba(15,23,42,.1);border-color:#bcd0f7}.module b{font-size:19px}.module span{font-size:34px;display:block;margin-bottom:12px}
label{font-weight:700;font-size:13px;color:#344054}input,select,textarea,button{font:inherit;padding:11px 12px;border:1px solid var(--line);border-radius:14px;width:100%;background:white;color:var(--text);outline:none}input:focus,select:focus,textarea:focus{border-color:#93b4f8;box-shadow:0 0 0 4px rgba(37,99,235,.12)}textarea{min-height:92px;resize:vertical}button,.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--primary);color:white;border:0;padding:11px 16px;border-radius:14px;cursor:pointer;width:auto;font-weight:800;box-shadow:0 10px 20px rgba(37,99,235,.18)}button:hover,.btn:hover{background:var(--primary-dark);color:white}.btn.ghost{background:white;color:var(--text);border:1px solid var(--line);box-shadow:none}.danger{background:var(--danger)!important;color:white!important}.ok{background:var(--ok)!important;color:white!important}.pill{display:inline-block;padding:5px 9px;border-radius:999px;background:#eef4ff;color:#1d4ed8;font-weight:700;font-size:12px}
.formgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;align-items:end}.formgrid label{display:flex;flex-direction:column;gap:6px}table{width:100%;border-collapse:separate;border-spacing:0;background:white;border:1px solid var(--line);border-radius:18px;overflow:hidden}th,td{padding:12px 13px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{background:#f8fafc;color:#475467;font-size:12px;text-transform:uppercase;letter-spacing:.05em}tr:last-child td{border-bottom:0}.right{text-align:right}.table-wrap{overflow:auto;border-radius:18px}.login{max-width:430px;margin:7vh auto}.login-shell{min-height:100vh;display:grid;place-items:center;padding:22px}.login .brandbox{border:0;color:#172033;padding:0 0 18px}.login .brand-sub{color:var(--muted)}
.msg{padding:12px 14px;margin:10px 0;border-radius:16px;background:#eef4ff;border:1px solid #d7e4ff}.msg.me{background:#e8fff4;border-color:#bbf7d0}.roomlist a{display:inline-flex;margin:5px;padding:9px 12px;background:#eef2f7;border-radius:999px;color:#344054;font-weight:700}.roomlist a.active{background:var(--primary);color:white}
@media(max-width:900px){.app-shell{grid-template-columns:1fr}.sidebar{position:relative;height:auto;border-radius:0 0 26px 26px}.side-nav{display:grid;grid-template-columns:repeat(auto-fit,minmax(145px,1fr));overflow:visible}.userbox{margin-top:0}.content{padding:18px}.page-card{padding:18px;min-height:auto}.topbar{align-items:flex-start}.topbar .btn{display:none}}
@media(max-width:620px){.brandbox{align-items:flex-start}.page-title{font-size:22px}h1{font-size:25px}.formgrid{grid-template-columns:1fr}table{font-size:13px;display:block;overflow:auto;white-space:nowrap}.card{padding:16px}.side-nav a{padding:10px}.content{padding:14px}}

.inline-form{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.inline-form input{min-width:110px}.inline-form button{white-space:nowrap}table .muted{color:#7b8190}.badge{display:inline-block;padding:4px 8px;border-radius:999px;background:#eef2ff;color:#334155;font-size:12px;font-weight:700}