:root{
  --primary:#185FA5; --primary-light:#E6F1FB; --primary-dark:#0C447C;
  --success:#3B6D11; --success-bg:#EAF3DE;
  --danger:#A32D2D; --danger-bg:#FCEBEB;
  --warning:#BA7517; --warning-bg:#FAEEDA;
  --gray-50:#f8f9fa; --gray-100:#f1f3f5; --gray-200:#e9ecef;
  --gray-300:#dee2e6; --gray-400:#ced4da; --gray-500:#adb5bd;
  --gray-600:#868e96; --gray-700:#495057; --gray-800:#343a40; --gray-900:#212529;
  --text:#212529; --text-muted:#868e96;
  --bg:#f5f6f8; --card-bg:#fff; --border:#e9ecef;
  --radius:8px; --radius-lg:12px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--font);background:var(--bg);color:var(--text);font-size:14px;line-height:1.5}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* ── Login ── */
.login-page{display:flex;min-height:100vh;background:linear-gradient(135deg,#f0f4ff,#e8f0fa)}
.login-left{flex:1;display:flex;flex-direction:column;justify-content:center;padding:60px;max-width:560px}
.login-left h1{font-size:28px;font-weight:700;color:var(--primary-dark);margin-bottom:8px}
.login-left p{font-size:14px;color:var(--gray-600);margin-bottom:32px;line-height:1.7}
.login-features{display:flex;flex-direction:column;gap:16px}
.login-feature{display:flex;align-items:center;gap:12px;padding:8px 0;font-size:14px;color:var(--gray-700)}
.login-right{flex:1;display:flex;align-items:center;justify-content:center;padding:40px}
.login-card{background:var(--card-bg);border-radius:var(--radius-lg);padding:36px;width:380px;box-shadow:0 4px 24px rgba(0,0,0,0.06)}
.login-card .tabs{display:flex;border-bottom:2px solid var(--gray-200);margin-bottom:24px}
.login-card .tab{flex:1;padding:10px 0;text-align:center;font-size:14px;font-weight:500;cursor:pointer;color:var(--text-muted);border-bottom:2px solid transparent;margin-bottom:-2px;transition:all 0.15s}
.login-card .tab.active{color:var(--primary);border-bottom-color:var(--primary)}
.login-card .tab-content{display:none}
.login-card .tab-content.active{display:block}
.qr-box{width:200px;height:200px;background:var(--gray-100);border-radius:var(--radius);margin:0 auto 16px;display:flex;align-items:center;justify-content:center;border:2px dashed var(--gray-300)}
.qr-box .qr-placeholder{font-size:12px;color:var(--text-muted);text-align:center;line-height:1.6}
.qr-tip{text-align:center;font-size:12px;color:var(--text-muted);margin-bottom:16px}

/* ── Forms ── */
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:13px;font-weight:500;margin-bottom:4px;color:var(--gray-700)}
.form-input,.form-select{width:100%;padding:9px 12px;border:1px solid var(--gray-300);border-radius:var(--radius);font-size:14px;outline:none;transition:border-color 0.15s;font-family:var(--font);background:var(--card-bg)}
.form-input:focus,.form-select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(24,95,165,0.1)}
.form-row{display:flex;gap:12px}
.form-row .form-group{flex:1}
.form-hint{font-size:12px;color:var(--text-muted);margin-top:4px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 20px;border:none;border-radius:var(--radius);font-size:14px;font-weight:600;cursor:pointer;transition:all 0.15s;font-family:var(--font)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-outline{background:transparent;color:var(--text);border:1px solid var(--gray-300)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-success{background:var(--success);color:#fff}
.btn-danger{background:var(--danger);color:#fff}
.btn-sm{padding:6px 12px;font-size:12px}
.btn-xs{padding:4px 8px;font-size:11px}
.btn-block{width:100%;padding:10px}
.login-footer{text-align:center;margin-top:16px;font-size:12px;color:var(--text-muted)}

/* ── App Layout ── */
.app{display:none;height:100vh;overflow:hidden}
.app.active{display:flex}
.sidebar{width:220px;background:var(--gray-900);color:#fff;display:flex;flex-direction:column;flex-shrink:0}
.sidebar-header{padding:16px 20px;font-size:14px;font-weight:600;border-bottom:1px solid rgba(255,255,255,0.1);display:flex;align-items:center;gap:8px;flex-shrink:0}
.sidebar-user{padding:14px 20px;border-top:1px solid rgba(255,255,255,0.1);flex-shrink:0}
.sidebar-user .name{font-size:13px;font-weight:500}
.sidebar-user .role{font-size:11px;color:rgba(255,255,255,0.4);margin-top:2px}
.sidebar-nav{flex:1;padding:12px 0;overflow:auto}
.nav-item{display:flex;align-items:center;gap:10px;padding:10px 20px;color:rgba(255,255,255,0.6);cursor:pointer;font-size:13px;transition:all 0.15s;border-left:3px solid transparent}
.nav-item:hover{background:rgba(255,255,255,0.06);color:#fff}
.nav-item.active{background:rgba(255,255,255,0.1);color:#fff;border-left-color:#85B7EB}
.main{flex:1;display:flex;flex-direction:column;overflow:hidden}
.topbar{height:52px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 20px;background:var(--card-bg);flex-shrink:0}
.topbar-title{font-size:14px;font-weight:600}
.topbar-right{display:flex;align-items:center;gap:12px}
.topbar-user{font-size:13px;color:var(--text-muted)}
.topbar-logout{padding:4px 12px;border:1px solid var(--gray-300);border-radius:6px;font-size:12px;cursor:pointer;background:var(--card-bg);color:var(--text);transition:all 0.15s}
.topbar-logout:hover{border-color:var(--danger);color:var(--danger)}
.content{flex:1;overflow:auto;padding:20px}

/* ── Dashboard ── */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-bottom:20px}
.stat-card{background:var(--card-bg);border-radius:var(--radius);padding:16px;border:1px solid var(--border)}
.stat-num{font-size:24px;font-weight:700}
.stat-label{font-size:12px;color:var(--text-muted);margin-top:2px}
.section-title{font-size:15px;font-weight:600;margin-bottom:12px;display:flex;align-items:center;justify-content:space-between}
.todo-list{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-bottom:20px}
.todo-item{display:flex;align-items:center;gap:8px;padding:8px 0;border-bottom:1px solid var(--gray-100);font-size:13px;cursor:pointer}
.todo-item:last-child{border-bottom:none}
.todo-item:hover{color:var(--primary)}
.todo-dot{width:6px;height:6px;border-radius:50%;flex-shrink:0}
.todo-dot.warning{background:var(--warning)}

/* ── Table ── */
.table-wrap{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
table.data{width:100%;border-collapse:collapse;font-size:13px}
table.data th{padding:10px 14px;text-align:left;font-size:12px;font-weight:600;color:var(--text-muted);background:var(--gray-50);border-bottom:1px solid var(--border);white-space:nowrap}
table.data td{padding:10px 14px;border-bottom:1px solid var(--gray-100)}
table.data tr:hover td{background:rgba(24,95,165,0.02)}
table.data .ops{display:flex;gap:4px}
.tag{display:inline-flex;padding:2px 8px;border-radius:4px;font-size:11px;font-weight:500}
.tag-success{background:var(--success-bg);color:var(--success)}
.tag-warning{background:var(--warning-bg);color:var(--warning)}
.tag-danger{background:var(--danger-bg);color:var(--danger)}
.tag-primary{background:var(--primary-light);color:var(--primary)}

/* ── Modal ── */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.3);z-index:1000;display:none;align-items:center;justify-content:center}
.modal-overlay.show{display:flex}
.modal{background:var(--card-bg);border-radius:var(--radius-lg);width:560px;max-width:90vw;max-height:85vh;overflow-y:auto;padding:28px;box-shadow:0 8px 32px rgba(0,0,0,0.12)}
.modal h2{font-size:18px;font-weight:600;margin-bottom:20px}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:24px;padding-top:16px;border-top:1px solid var(--border)}

/* ── Toast ── */
.toast{position:fixed;top:20px;right:20px;padding:12px 20px;border-radius:var(--radius);font-size:13px;z-index:2000;animation:slideIn 0.3s;max-width:360px;box-shadow:0 4px 12px rgba(0,0,0,0.1)}
.toast.success{background:var(--success-bg);color:var(--success);border-left:3px solid var(--success)}
.toast.error{background:var(--danger-bg);color:var(--danger);border-left:3px solid var(--danger)}
.toast.info{background:var(--primary-light);color:var(--primary);border-left:3px solid var(--primary)}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}

/* ── Empty State ── */
.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}
.empty-state .empty-icon{font-size:48px;margin-bottom:12px;opacity:0.3}

/* ── Channel Grid ── */
.channel-grid{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.channel-chip{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:20px;border:1.5px solid #dde1e6;font-size:13px;cursor:pointer;transition:all 0.2s;background:#f8f9fb;user-select:none}
.channel-chip input{display:none}
.channel-chip .chip-icon{font-size:14px;opacity:0.6}
.channel-chip.checked{background:var(--primary-light);border-color:var(--primary);color:var(--primary)}
.channel-chip.checked .chip-icon{opacity:1}
.channel-chip:hover{border-color:var(--primary);box-shadow:0 0 0 2px rgba(24,95,165,0.12)}

/* ── Channel Badges in Table ── */
.chip-s,.chip-r,.chip-c,.chip-e{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border-radius:6px;font-size:11px;font-weight:700;color:#fff}
.chip-s{background:#185FA5}
.chip-r{background:#1D9E75}
.chip-c{background:#534AB7}
.chip-e{background:#d73782}

/* ── Upload Zone ── */
.upload-zone{border:2px dashed #dde1e6;border-radius:12px;padding:30px;text-align:center;cursor:pointer;transition:all 0.2s;background:#f8f9fb}
.upload-zone:hover{border-color:var(--primary);background:var(--primary-light)}
.upload-zone .upload-icon{font-size:36px;margin-bottom:8px;opacity:0.5}
.upload-zone p{font-size:13px;color:var(--text-muted)}

/* ── Responsive ── */
@media(max-width:768px){
  .login-page{flex-direction:column}
  .login-left{padding:40px 24px;max-width:100%}
  .login-right{padding:24px}
  .sidebar{width:56px}
  .sidebar-header span,.sidebar-user,.nav-item span{display:none}
  .nav-item{justify-content:center;padding:10px}
}