:root{--bg: #f8fafc;--surface: #ffffff;--border: #e2e8f0;--text: #1e293b;--text-muted: #64748b;--primary: #4f46e5;--primary-hover: #4338ca;--primary-light: #eef2ff;--success: #16a34a;--warning: #d97706;--danger: #dc2626;--radius: 8px;--shadow: 0 1px 3px rgba(0,0,0,.1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}a{color:var(--primary);text-decoration:none}button{cursor:pointer;font-family:inherit}.container{max-width:1200px;margin:0 auto;padding:0 20px}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius);border:1px solid transparent;font-size:14px;font-weight:500;transition:all .15s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-secondary{background:var(--surface);border-color:var(--border);color:var(--text)}.btn-secondary:hover{background:var(--bg)}.btn-danger{background:var(--danger);color:#fff}.btn-sm{padding:4px 10px;font-size:13px}.btn:disabled{opacity:.5;cursor:not-allowed}.input{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;outline:none}.input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;font-weight:500}.badge-queued{background:#f1f5f9;color:#475569}.badge-running{background:#fef3c7;color:#92400e}.badge-succeeded,.badge-approved{background:#dcfce7;color:#166534}.badge-failed,.badge-rejected{background:#fee2e2;color:#991b1b}.badge-cancelled{background:#f1f5f9;color:#64748b}.badge-draft{background:#f1f5f9;color:#475569}.badge-pending{background:#fef3c7;color:#92400e}.badge-private{background:#f1f5f9;color:#475569}.badge-public{background:#dbeafe;color:#1e40af}.navbar{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}.navbar-inner{display:flex;align-items:center;justify-content:space-between;height:56px}.logo{font-weight:700;font-size:18px;color:var(--primary);display:flex;align-items:center;gap:8px}.nav-links{display:flex;gap:4px}.nav-link{padding:6px 12px;border-radius:var(--radius);font-size:14px;color:var(--text-muted);cursor:pointer;border:none;background:none}.nav-link:hover{background:var(--bg);color:var(--text)}.nav-link.active{background:var(--primary-light);color:var(--primary);font-weight:500}.main{padding:24px 0;min-height:calc(100vh - 56px)}.grid{display:grid;gap:20px}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}@media(max-width:768px){.grid-2,.grid-3{grid-template-columns:1fr}}.page-title{font-size:24px;font-weight:700;margin-bottom:4px}.page-subtitle{color:var(--text-muted);margin-bottom:24px}.form-group{margin-bottom:16px}.form-label{display:block;font-size:14px;font-weight:500;margin-bottom:6px}.form-select{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;background:var(--surface)}.progress-bar{width:100%;height:8px;background:var(--border);border-radius:999px;overflow:hidden}.progress-fill{height:100%;background:var(--primary);transition:width .3s}.hero{text-align:center;padding:48px 0 32px}.hero h1{font-size:36px;font-weight:800;margin-bottom:12px}.hero p{color:var(--text-muted);font-size:18px;max-width:600px;margin:0 auto 24px}.hero-actions{display:flex;gap:12px;justify-content:center}.skill-card{cursor:pointer;transition:all .2s}.skill-card:hover{border-color:var(--primary);box-shadow:0 4px 12px #4f46e526}.skill-card.selected{border-color:var(--primary);background:var(--primary-light)}.skill-icon{font-size:32px;margin-bottom:12px}.skill-name{font-weight:600;font-size:16px;margin-bottom:4px}.skill-desc{font-size:13px;color:var(--text-muted)}.lesson-card{display:flex;flex-direction:column;gap:8px}.lesson-card .lesson-title{font-weight:600;font-size:15px}.lesson-card .lesson-meta{font-size:13px;color:var(--text-muted)}.lesson-card .lesson-actions{display:flex;gap:8px;margin-top:auto;padding-top:8px}.lesson-frame{width:100%;height:calc(100vh - 56px);border:none}.auth-box{max-width:400px;margin:48px auto}.auth-tabs{display:flex;margin-bottom:20px;border-bottom:1px solid var(--border)}.auth-tab{flex:1;padding:10px;text-align:center;cursor:pointer;border:none;background:none;font-size:15px;color:var(--text-muted);border-bottom:2px solid transparent}.auth-tab.active{color:var(--primary);border-bottom-color:var(--primary)}.empty-state{text-align:center;padding:48px;color:var(--text-muted)}.table{width:100%;border-collapse:collapse}.table th,.table td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border);font-size:14px}.table th{font-weight:600;color:var(--text-muted);font-size:13px}.stat-card{text-align:center}.stat-value{font-size:28px;font-weight:700;color:var(--primary)}.stat-label{font-size:13px;color:var(--text-muted);margin-top:4px}.alert{padding:10px 14px;border-radius:var(--radius);font-size:14px;margin-bottom:16px}.alert-error{background:#fee2e2;color:#991b1b}.alert-success{background:#dcfce7;color:#166534}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}.flex{display:flex}.gap-8{gap:8px}.gap-12{gap:12px}.items-center{align-items:center}.justify-between{justify-content:space-between}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}