@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";:root{--bg-deep: #050505;--bg-admin: #0a0a0f;--bg-admin-main: #0e0e14;--bg-panel: #121218;--bg-panel-2: #16161f;--bg-input: #0f1016;--border: rgba(255, 255, 255, .07);--border-input: #374151;--text: #f9fafb;--muted: #9ca3af;--accent: #7c3aed;--accent-2: #9333ea;--accent-soft: #a78bfa;--accent-glow: rgba(124, 58, 237, .5);--danger: #f87171;--ok: #34d399;--warn: #fbbf24;--student-bg: #eeebf4;--student-panel: #ffffff;--student-text: #111827;--student-muted: #6b7280;--radius: 10px;--radius-lg: 16px;--font: "Inter", system-ui, -apple-system, sans-serif}*{box-sizing:border-box}body{margin:0;font-family:var(--font);font-size:14px;background:var(--bg-deep);color:var(--text);-webkit-font-smoothing:antialiased}a{color:var(--accent-soft);text-decoration:none}a:hover{text-decoration:underline}button,.btn{border:1px solid var(--border);background:var(--bg-panel-2);color:var(--text);border-radius:var(--radius);padding:8px 14px;cursor:pointer;font-size:13px;font-family:inherit;transition:background .15s,border-color .15s,filter .15s}button:hover{border-color:#ffffff29}button.primary,.btn.primary{background:linear-gradient(135deg,var(--accent-2) 0%,var(--accent) 100%);border:none;color:#fff;font-weight:600;box-shadow:0 8px 28px #7c3aed6b}button.primary:hover{filter:brightness(1.06)}button.danger{border-color:#f8717159;color:var(--danger);background:transparent}input,textarea,select{width:100%;padding:11px 14px;border:1px solid var(--border-input);border-radius:var(--radius);background:var(--bg-input);color:var(--text);font-size:14px;font-family:inherit}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #7c3aed38}label{display:block;margin-bottom:6px;color:var(--muted);font-size:13px;font-weight:500}.form-row{margin-bottom:14px}.muted{color:var(--muted);font-size:13px}.error{color:var(--danger);font-size:13px;margin:8px 0}.auth-scene{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px 16px;background:var(--bg-deep);position:relative;overflow:hidden}.auth-scene:before{content:"";position:absolute;top:-140px;left:-100px;width:480px;height:480px;background:radial-gradient(circle,var(--accent-glow) 0%,transparent 68%);pointer-events:none}.auth-scene:after{content:"";position:absolute;bottom:-120px;right:-80px;width:380px;height:380px;background:radial-gradient(circle,rgba(147,51,234,.28) 0%,transparent 70%);pointer-events:none}.auth-card{position:relative;z-index:1;width:100%;max-width:400px;background:var(--bg-panel);border:1px solid rgba(255,255,255,.06);border-radius:var(--radius-lg);padding:36px 32px 28px;box-shadow:0 24px 64px #00000073}.auth-brand{font-size:1.4rem;font-weight:800;letter-spacing:.08em;margin:0 0 8px;color:#fff;text-transform:uppercase}.auth-subtitle{margin:0 0 26px;color:var(--muted);font-size:14px;line-height:1.45}.auth-submit{width:100%;padding:13px;margin-top:6px;font-size:14px;border-radius:var(--radius)}.auth-footer{margin-top:18px;text-align:center;font-size:13px;color:var(--muted)}.auth-footer a{color:var(--accent-soft);font-weight:500}.input-with-icon{position:relative}.input-with-icon .field-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:#6b7280;pointer-events:none}.input-with-icon input{padding-left:40px}.password-field{position:relative}.password-field input{padding-right:44px}.password-toggle{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:none;border:none;color:#6b7280;padding:6px;display:flex;align-items:center;justify-content:center}.password-toggle:hover{color:var(--accent-soft)}.checkbox-row{display:flex;gap:8px;align-items:flex-start;margin:10px 0;font-size:12px;color:var(--muted)}.checkbox-row input{width:auto;margin-top:2px}.layout-admin{display:flex;min-height:100vh;background:var(--bg-admin-main)}.sidebar{width:232px;background:var(--bg-admin);border-right:1px solid var(--border);padding:14px 10px;flex-shrink:0;display:flex;flex-direction:column}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:8px 10px 14px;border-bottom:1px solid var(--border);margin-bottom:10px}.sidebar-brand-text{line-height:1.2}.sidebar-brand-text strong{display:block;font-size:12px;font-weight:800;letter-spacing:.06em;color:#fff}.sidebar-brand-text span{font-size:10px;color:var(--muted);letter-spacing:.12em;text-transform:uppercase}.sidebar nav button{display:flex;align-items:center;gap:10px;width:100%;text-align:left;margin-bottom:2px;background:transparent;border:none;color:var(--muted);padding:9px 12px;border-radius:8px;font-size:13px}.sidebar nav button svg{flex-shrink:0;opacity:.75}.sidebar nav button:hover{color:var(--text);background:#ffffff0a}.sidebar nav button.active{background:#7c3aed2e;color:#ede9fe;border-left:2px solid var(--accent);padding-left:10px}.sidebar nav button.active svg{opacity:1;color:var(--accent-soft)}.sidebar-footer{margin-top:auto;padding:8px}.admin-shell{flex:1;display:flex;flex-direction:column;min-width:0}.admin-topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 22px;border-bottom:1px solid var(--border);background:#0a0a0fd9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.admin-search{position:relative;flex:1;max-width:360px}.admin-search .field-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--muted)}.admin-search input{padding-left:38px;background:var(--bg-panel);border-color:var(--border);font-size:13px}.admin-user{display:flex;align-items:center;gap:10px;font-size:13px}.admin-user-avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--accent-2),var(--accent));display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px;color:#fff}.admin-user-meta{line-height:1.25}.admin-user-meta strong{display:block;font-size:13px}.admin-user-meta span{font-size:11px;color:var(--muted)}.main{flex:1;padding:20px 24px 28px;overflow:auto}.page-head{margin-bottom:18px}.page-head h2{margin:0 0 4px;font-size:1.35rem;font-weight:700}.page-head p{margin:0;color:var(--muted);font-size:13px}.panel{background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-lg);padding:14px 16px;margin-bottom:12px}.table{width:100%;border-collapse:collapse;font-size:13px}.table th,.table td{border-bottom:1px solid var(--border);padding:10px 12px;text-align:left}.table th{color:var(--muted);font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:.04em}.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 8px;border-radius:999px;font-size:11px;font-weight:600;border:1px solid var(--border)}.badge.ok{border-color:#34d39959;color:var(--ok);background:#34d39914}.badge.muted{color:var(--muted)}.badge.warn{border-color:#fbbf2459;color:var(--warn);background:#fbbf2414}.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:16px}.stat-card{padding:16px}.stat-card .stat-label{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px}.stat-card .stat-num{font-size:1.85rem;font-weight:800;color:#fff;line-height:1;margin-bottom:6px}.stat-card .stat-trend{font-size:12px;color:var(--ok)}.stat-card .stat-trend.neutral{color:var(--muted)}.admin-two-col{display:grid;grid-template-columns:1.4fr 1fr;gap:12px}.chart-panel h3,.events-panel h3{margin:0 0 12px;font-size:14px}.chart-bars{display:flex;align-items:flex-end;gap:6px;height:120px;padding-top:8px}.chart-bar-col{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;height:100%;justify-content:flex-end}.chart-bar-col .bar{width:100%;max-width:28px;background:linear-gradient(180deg,var(--accent-soft),var(--accent));border-radius:4px 4px 0 0;min-height:4px}.chart-bar-col span{font-size:10px;color:var(--muted)}.event-list{display:flex;flex-direction:column;gap:10px}.event-item{display:flex;gap:10px;align-items:flex-start;font-size:13px}.event-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);margin-top:5px;flex-shrink:0}.event-item .event-meta{font-size:11px;color:var(--muted)}.course-admin-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px}.course-admin-card{cursor:pointer;transition:border-color .15s,transform .15s}.course-admin-card:hover{border-color:#7c3aed73;transform:translateY(-1px)}.course-admin-card h3{margin:0 0 8px;font-size:15px}.course-admin-card .meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:12px;color:var(--muted)}.toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:14px}.toolbar .spacer{flex:1}.editor-layout{display:grid;grid-template-columns:260px 1fr;gap:12px;align-items:start}.editor-tree{max-height:70vh;overflow:auto}.editor-tree .module-title{font-size:12px;font-weight:600;color:var(--accent-soft);margin:12px 0 6px}.editor-tree button.lesson-link{display:block;width:100%;text-align:left;background:transparent;border:none;color:var(--muted);padding:6px 8px;border-radius:6px;font-size:12px}.editor-tree button.lesson-link.active,.editor-tree button.lesson-link:hover{background:#7c3aed1f;color:#ede9fe}.drop-zone{border:1px dashed var(--border-input);border-radius:var(--radius);padding:24px;text-align:center;color:var(--muted);font-size:13px}.access-matrix-wrap{overflow-x:auto}.access-matrix{min-width:640px}.access-matrix th.course-col{font-size:11px;max-width:90px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.access-matrix input[type=checkbox]{width:auto}.student-layout{min-height:100vh;background:var(--student-bg);color:var(--student-text);display:flex;flex-direction:column}.student-header{background:var(--bg-deep);border-bottom:1px solid var(--border);padding:10px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}.student-header .logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:14px;letter-spacing:.06em;color:#fff;text-transform:uppercase}.student-header .logo em{color:var(--accent-soft);font-style:normal}.student-nav{display:flex;gap:4px;align-items:center;flex:1;justify-content:center}.student-nav button{background:transparent;border:none;color:#d1d5db;font-size:13px;padding:8px 12px;border-radius:8px}.student-nav button:hover,.student-nav button.active{color:#fff;background:#ffffff0f}.student-user{display:flex;align-items:center;gap:8px;color:#e5e7eb;font-size:13px}.student-user-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--accent-2),var(--accent));display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:#fff}.student-main{max-width:1040px;width:100%;margin:0 auto;padding:22px 16px 32px;flex:1}.student-breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:12px;color:var(--student-muted);margin-bottom:14px}.student-breadcrumb button{background:none;border:none;color:var(--student-muted);padding:0;font-size:12px}.student-breadcrumb button:hover{color:var(--accent)}.student-panel{background:var(--student-panel);border:1px solid #e5e7eb;border-radius:var(--radius-lg);padding:22px;box-shadow:0 8px 32px #1118270f}.student-panel h2{margin:0 0 6px;font-size:1.35rem;font-weight:700}.student-panel .lead{margin:0 0 18px;color:var(--student-muted)}.student-panel input,.student-panel textarea,.student-panel select{background:#f9fafb;border-color:#e5e7eb;color:var(--student-text)}.student-panel button.primary{color:#fff}.student-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-bottom:20px}.student-stat{background:#f9fafb;border:1px solid #e5e7eb;border-radius:var(--radius);padding:14px 16px}.student-stat .num{font-size:1.75rem;font-weight:800;color:var(--accent);line-height:1}.student-stat .label{font-size:12px;color:var(--student-muted);margin-top:4px}.section-title{font-size:13px;font-weight:600;color:var(--student-muted);text-transform:uppercase;letter-spacing:.04em;margin:0 0 12px}.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}.course-card{border:1px solid #e5e7eb;border-radius:var(--radius-lg);padding:18px;background:#fff;display:flex;flex-direction:column;gap:10px;min-height:180px}.course-card.clickable{cursor:pointer;transition:border-color .15s,box-shadow .15s}.course-card.clickable:hover{border-color:var(--accent);box-shadow:0 8px 24px #7c3aed1f}.course-card.locked{opacity:.92;background:#fafafa}.course-tag{display:inline-block;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--accent);background:#7c3aed1a;padding:4px 8px;border-radius:6px;width:fit-content}.course-card h3{margin:0;font-size:16px;line-height:1.35}.course-card .course-desc{margin:0;font-size:13px;color:var(--student-muted);flex:1}.course-card .course-meta{font-size:12px;color:var(--student-muted)}.progress-bar{height:6px;background:#e5e7eb;border-radius:4px;overflow:hidden}.progress-bar>div{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-soft));border-radius:4px}.progress-row{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--student-muted)}.course-card .card-actions{display:flex;gap:8px;align-items:center}.locked-label{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--student-muted)}.course-layout{display:grid;grid-template-columns:280px 1fr;gap:16px;align-items:start}.course-sidebar{max-height:75vh;overflow:auto}.course-sidebar h3{margin:0 0 12px;font-size:14px}.program-module{margin-bottom:14px}.program-module .mod-name{font-size:12px;font-weight:600;color:var(--student-muted);margin-bottom:6px}.program-lesson{display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:13px;border:none;background:none;text-align:left;color:var(--student-text);cursor:pointer;width:100%}.program-lesson .num{color:var(--accent);font-weight:700;font-size:12px;min-width:28px}.program-lesson.active{color:var(--accent);font-weight:600}.course-hero-tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;color:var(--accent);margin-bottom:8px}.course-progress-block{background:#f9fafb;border:1px solid #e5e7eb;border-radius:var(--radius);padding:16px;margin:16px 0}.course-progress-block .pct{font-size:1.5rem;font-weight:800;color:var(--accent)}.next-step{background:linear-gradient(135deg,#7c3aed14,#9333ea0a);border:1px solid rgba(124,58,237,.2);border-radius:var(--radius);padding:16px;margin-top:16px}.next-step .label{font-size:11px;font-weight:700;letter-spacing:.06em;color:var(--accent);margin-bottom:6px}.teacher-card{display:flex;gap:12px;align-items:center;margin-top:20px;padding-top:16px;border-top:1px solid #e5e7eb}.teacher-card .avatar{width:44px;height:44px;border-radius:50%;background:#e5e7eb;display:flex;align-items:center;justify-content:center;font-weight:700;color:var(--accent)}.lesson-layout{display:grid;grid-template-columns:260px 1fr;gap:16px;align-items:start}.lesson-sidebar h3{margin:0 0 10px;font-size:13px;color:var(--student-muted)}.lesson-content h1{margin:0 0 4px;font-size:1.4rem}.lesson-kicker{font-size:12px;color:var(--accent);font-weight:600;margin-bottom:12px}.lesson-body{white-space:pre-wrap;line-height:1.65;margin:16px 0;font-size:14px}.hw-block{background:#f9fafb;border:1px solid #e5e7eb;border-radius:var(--radius);padding:16px;margin-top:20px}.hw-block h3{margin:0 0 10px;font-size:14px}.lesson-nav{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}.footer-legal{padding:12px;font-size:12px;color:var(--student-muted);text-align:center;background:var(--student-bg)}.footer-legal a{color:var(--accent);margin:0 8px}.link-btn{background:none;border:none;color:var(--accent);padding:0;cursor:pointer;font-size:13px}.row-flex{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.public-page{min-height:100vh;background:var(--bg-deep);display:flex;align-items:center;justify-content:center;padding:24px;position:relative}.public-page:before{content:"";position:absolute;top:-80px;left:-40px;width:360px;height:360px;background:radial-gradient(circle,var(--accent-glow) 0%,transparent 70%);pointer-events:none}.public-card{position:relative;z-index:1;width:100%;max-width:420px;background:var(--bg-panel);border:1px solid rgba(255,255,255,.06);border-radius:var(--radius-lg);padding:28px;text-align:center;box-shadow:0 24px 64px #0006}.public-card .auth-brand{margin-bottom:12px}.public-card h1{color:#fff;font-size:1.2rem;margin:0 0 12px}.public-card img{max-width:100%;border-radius:var(--radius);margin:12px 0}.public-card .btn.primary{display:inline-flex;align-items:center;gap:8px;margin-top:8px;text-decoration:none;padding:12px 24px}.landing-scene{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:var(--bg-deep);position:relative}.landing-scene:before{content:"";position:absolute;top:-100px;left:50%;transform:translate(-50%);width:500px;height:400px;background:radial-gradient(circle,var(--accent-glow) 0%,transparent 65%);pointer-events:none}.landing-card{position:relative;z-index:1;text-align:center;max-width:400px}.landing-card .auth-brand{font-size:1.75rem;margin-bottom:8px}.landing-actions{display:flex;flex-direction:column;gap:10px;margin-top:24px}.landing-actions button{width:100%;padding:12px}.landing-actions button.ghost{background:transparent;border:1px solid var(--border);color:var(--muted);box-shadow:none}.version-tag{font-size:11px;color:var(--muted);margin-top:8px}@media (max-width: 900px){.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.admin-two-col,.course-layout,.lesson-layout,.editor-layout{grid-template-columns:1fr}}@media (max-width: 720px){.layout-admin{flex-direction:column}.sidebar{width:100%;border-right:none;border-bottom:1px solid var(--border)}.sidebar nav{display:flex;flex-wrap:wrap;gap:4px}.sidebar nav button{width:auto;flex:1;min-width:120px;justify-content:center}.student-nav{display:none}.stats-grid{grid-template-columns:1fr}}