:root{--brand: #006369;--brand-dark: #00494e;--brand-light: #e6f2f2;--brand-soft: rgba(0, 99, 105, .09);--brand-soft-strong: rgba(0, 99, 105, .16);--bg: #ffffff;--bg-elevated: #ffffff;--bg-card: #ffffff;--bg-subtle: #f5f8f8;--bg-hover: #eef3f3;--border: #e3eaea;--border-strong: #d3dede;--text: #10201f;--text-muted: #5c7170;--text-faint: #93a5a4;--success: #10916f;--success-soft: rgba(16, 145, 111, .12);--danger: #d33a4b;--danger-soft: rgba(211, 58, 75, .1);--warning: #b8790a;--warning-soft: rgba(184, 121, 10, .12);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 18px;--shadow-card: 0 1px 2px rgba(16, 32, 31, .04), 0 1px 1px rgba(16, 32, 31, .03);--shadow-pop: 0 12px 32px rgba(16, 32, 31, .12);font-synthesis:none}*{box-sizing:border-box}html,body{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,Segoe UI,-apple-system,BlinkMacSystemFont,Roboto,Helvetica,Arial,sans-serif;font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased;overflow:hidden}#root{height:100vh}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:8px}::-webkit-scrollbar-track{background:transparent}h1,h2,h3,h4{margin:0;font-weight:650;letter-spacing:-.015em;color:var(--text)}p{margin:0}code{background:var(--brand-soft);color:var(--brand-dark);padding:1px 5px;border-radius:4px;font-size:.92em}button{font-family:inherit}a{color:var(--brand)}.app-shell{display:grid;grid-template-columns:244px 1fr;height:100vh;background:var(--bg-subtle)}.sidebar{background:var(--bg-elevated);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:22px 14px}.sidebar-brand{display:flex;align-items:center;gap:11px;padding:2px 8px 24px}.sidebar-brand img{width:32px;height:32px;border-radius:9px;box-shadow:0 0 0 1px var(--border);background:#fff}.sidebar-brand-title{font-size:15px;font-weight:700;letter-spacing:-.01em;color:var(--text)}.sidebar-eyebrow{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint);padding:0 12px;margin-bottom:8px}.sidebar-nav{display:flex;flex-direction:column;gap:2px}.sidebar-nav-item{display:flex;align-items:center;gap:11px;padding:9px 12px;border-radius:var(--radius-sm);color:var(--text-muted);cursor:pointer;border:none;background:transparent;text-align:left;font-size:13.5px;font-weight:550;width:100%;transition:background .12s ease,color .12s ease}.sidebar-nav-item:hover{background:var(--bg-hover);color:var(--text)}.sidebar-nav-item.active{background:var(--brand);color:#fff;box-shadow:0 4px 10px #00636938}.sidebar-nav-item .icon{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;flex-shrink:0;border-radius:5px;overflow:hidden}.sidebar-nav-item .soon-badge{margin-left:auto;font-size:9.5px;font-weight:700;text-transform:uppercase;letter-spacing:.03em;padding:2px 7px;border-radius:20px;background:var(--bg-hover);color:var(--text-faint)}.sidebar-nav-item.active .soon-badge{background:#ffffff38;color:#fff}.sidebar-footer{margin-top:auto;padding:14px 10px 0;font-size:11px;color:var(--text-faint);border-top:1px solid var(--border)}.content-area{overflow-y:auto;padding:30px 40px 60px}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.page-header h1{font-size:21px}.page-subtitle{color:var(--text-muted);font-size:13px;margin-top:4px}.subnav{display:flex;gap:4px;margin-bottom:22px;background:var(--bg-subtle);border:1px solid var(--border);border-radius:var(--radius-sm);padding:4px;width:fit-content}.subnav-item{padding:7px 14px;border:none;background:transparent;color:var(--text-muted);font-size:13px;font-weight:550;cursor:pointer;border-radius:6px}.subnav-item:hover{color:var(--text)}.subnav-item.active{color:var(--brand);background:#fff;box-shadow:var(--shadow-card)}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow-card)}.card+.card{margin-top:16px}.card-title{font-size:14.5px;font-weight:650;margin-bottom:4px;letter-spacing:-.01em}.card-description{font-size:12.5px;color:var(--text-muted);margin-bottom:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 14px;border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:#fff;color:var(--text);font-size:13px;font-weight:550;cursor:pointer;transition:background .12s ease,border-color .12s ease}.btn:hover{background:var(--bg-hover);border-color:var(--text-faint)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-dark);border-color:var(--brand-dark)}.btn-danger{background:transparent;border-color:var(--danger);color:var(--danger)}.btn-danger:hover{background:var(--danger-soft)}.btn-sm{padding:5px 10px;font-size:12px}.input,.textarea,.select{width:100%;background:#fff;border:1px solid var(--border-strong);border-radius:var(--radius-sm);color:var(--text);padding:8px 10px;font-size:13px;font-family:inherit}.input:focus,.textarea:focus,.select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}.textarea{resize:vertical;min-height:90px}.field{margin-bottom:16px}.field label{display:block;font-size:12.5px;font-weight:650;color:var(--text-muted);margin-bottom:6px}.field-hint{font-size:11.5px;color:var(--text-faint);margin-top:5px}.badge{display:inline-flex;align-items:center;gap:4px;font-size:11px;font-weight:650;padding:2px 9px;border-radius:20px}.badge-success{background:var(--success-soft);color:var(--success)}.badge-danger{background:var(--danger-soft);color:var(--danger)}.badge-warning{background:var(--warning-soft);color:var(--warning)}.badge-neutral{background:var(--bg-hover);color:var(--text-muted)}.row{display:flex;align-items:center;gap:10px}.row-between{display:flex;align-items:center;justify-content:space-between}.stack{display:flex;flex-direction:column;gap:10px}.empty-state{text-align:center;padding:40px 20px;color:var(--text-muted)}.empty-state .icon{font-size:32px;margin-bottom:10px}.week-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:12px}.day-column{background:var(--bg-subtle);border:1px solid var(--border);border-radius:var(--radius-md);padding:12px;display:flex;flex-direction:column;min-height:220px}.day-column-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.day-column-title{font-size:12.5px;font-weight:700}.day-column-count{font-size:10.5px;font-weight:700;color:var(--brand);background:var(--brand-soft);border-radius:20px;padding:1px 7px}.time-slot-list{display:flex;flex-direction:column;gap:6px;flex:1}.time-slot{display:flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);padding:4px 4px 4px 8px}.time-slot input[type=time]{background:transparent;border:none;color:var(--text);font-size:12.5px;width:100%;font-family:inherit}.time-slot input[type=time]:focus{outline:none}.time-slot-remove{border:none;background:transparent;color:var(--text-faint);cursor:pointer;font-size:14px;line-height:1;padding:2px 4px;border-radius:4px}.time-slot-remove:hover{color:var(--danger);background:var(--danger-soft)}.add-slot-btn{margin-top:8px;border:1px dashed var(--border-strong);background:transparent;color:var(--text-muted);border-radius:var(--radius-sm);padding:6px;font-size:12px;cursor:pointer}.add-slot-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}.library-layout{display:grid;grid-template-columns:320px 1fr;gap:16px;align-items:start}.video-list{display:flex;flex-direction:column;gap:6px;max-height:640px;overflow-y:auto}.video-list-item{display:flex;align-items:center;gap:10px;padding:10px;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;background:var(--bg-subtle)}.video-list-item:hover{background:var(--bg-hover)}.video-list-item.selected{border-color:var(--brand);background:var(--brand-soft)}.video-list-item .thumb{width:34px;height:34px;border-radius:6px;background:var(--bg-hover);display:flex;align-items:center;justify-content:center;font-size:15px;flex-shrink:0}.video-list-item .meta{flex:1;min-width:0}.video-list-item .filename{font-size:12.5px;font-weight:550;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.video-list-item .subtext{font-size:11px;color:var(--text-faint);margin-top:2px}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:18px}.stat-tile{background:var(--bg-subtle);border:1px solid var(--border);border-radius:var(--radius-md);padding:14px}.stat-tile .stat-label{font-size:11px;color:var(--text-faint);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px;font-weight:650}.stat-tile .stat-value{font-size:22px;font-weight:700;color:var(--brand-dark);letter-spacing:-.02em}table.data-table{width:100%;border-collapse:collapse;font-size:12.5px}table.data-table th{text-align:left;color:var(--text-faint);font-weight:650;font-size:11px;text-transform:uppercase;letter-spacing:.03em;padding:8px 10px;border-bottom:1px solid var(--border)}table.data-table td{padding:10px;border-bottom:1px solid var(--border);vertical-align:middle}table.data-table tr:last-child td{border-bottom:none}.toast-container{position:fixed;bottom:20px;right:20px;display:flex;flex-direction:column;gap:8px;z-index:100}.toast{background:#fff;border:1px solid var(--border);border-left:3px solid var(--brand);border-radius:var(--radius-md);padding:12px 16px;font-size:12.5px;max-width:320px;box-shadow:var(--shadow-pop);color:var(--text)}.toast.success{border-left-color:var(--success)}.toast.error{border-left-color:var(--danger)}.switch{position:relative;display:inline-block;width:38px;height:22px;flex-shrink:0}.switch input{opacity:0;width:0;height:0}.switch-track{position:absolute;inset:0;background:var(--bg-hover);border:1px solid var(--border-strong);border-radius:20px;cursor:pointer;transition:background .15s ease}.switch-track:before{content:"";position:absolute;height:16px;width:16px;left:2px;top:2px;background:#fff;box-shadow:0 1px 2px #00000040;border-radius:50%;transition:transform .15s ease,background .15s ease}.switch input:checked+.switch-track{background:var(--brand);border-color:var(--brand)}.switch input:checked+.switch-track:before{transform:translate(16px)}.login-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}.login-card{width:320px;padding:24px}