:root{--bg-base: #080d1a;--bg-surface: #0e1526;--bg-raised: #141d35;--bg-hover: #1a2540;--bg-active: #1f2d4a;--border: #1e2d4a;--border-bright: #2a3d6a;--gold: #f1c40f;--gold-dim: #a8882a;--gold-faint: #2a220a;--purple: #8e44ad;--purple-dim: #5b2c6f;--green: #27ae60;--green-dim: #1a6b3a;--red: #e74c3c;--red-dim: #7b241c;--blue: #2980b9;--blue-dim: #1a5276;--text-primary: #d4e0f0;--text-secondary: #6a85a8;--text-muted: #354560;--text-gold: #f1c40f;--font-display: "Cinzel Decorative", serif;--font-heading: "Cinzel", serif;--font-body: "Lato", sans-serif;--font-mono: "JetBrains Mono", monospace;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--sidebar-w: 240px;--topbar-h: 60px;--shadow-card: 0 4px 24px rgba(0,0,0,.5);--shadow-modal: 0 8px 48px rgba(0,0,0,.8)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;background:var(--bg-base);color:var(--text-primary);font-family:var(--font-body);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit}input,select,textarea{font-family:inherit}.spinner{width:36px;height:36px;border:3px solid var(--border-bright);border-top-color:var(--gold);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.layout{display:grid;grid-template-columns:var(--sidebar-w) 1fr;grid-template-rows:var(--topbar-h) 1fr;height:100vh;overflow:hidden}.sidebar{grid-row:1 / -1;background:var(--bg-surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:0;overflow:hidden}.sidebar-brand{padding:22px 20px 18px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px}.sidebar-brand-icon{font-size:22px;line-height:1}.sidebar-brand-text{font-family:var(--font-display);font-size:14px;color:var(--gold);letter-spacing:1px;line-height:1.2}.sidebar-brand-sub{font-family:var(--font-body);font-size:10px;color:var(--text-muted);letter-spacing:2px;text-transform:uppercase;margin-top:2px}.sidebar-nav{flex:1;padding:16px 0;display:flex;flex-direction:column;gap:2px}.nav-link{display:flex;align-items:center;gap:12px;padding:11px 20px;color:var(--text-secondary);font-size:14px;font-weight:700;letter-spacing:.5px;border-left:3px solid transparent;transition:all .15s;text-decoration:none}.nav-link:hover{color:var(--text-primary);background:var(--bg-hover)}.nav-link.active{color:var(--gold);background:var(--gold-faint);border-left-color:var(--gold)}.nav-link-icon{font-size:16px;width:20px;text-align:center}.sidebar-footer{padding:16px 20px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:8px}.sidebar-user{font-size:12px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-user strong{display:block;color:var(--text-secondary);font-size:13px;margin-bottom:2px}.btn-signout{background:none;border:1px solid var(--border);color:var(--text-muted);padding:6px 12px;border-radius:var(--radius-sm);font-size:12px;transition:all .15s}.btn-signout:hover{border-color:var(--border-bright);color:var(--text-secondary)}.topbar{background:var(--bg-surface);border-bottom:1px solid var(--border);padding:0 28px;display:flex;align-items:center;justify-content:space-between}.topbar-title{font-family:var(--font-heading);font-size:17px;font-weight:600;color:var(--text-primary);letter-spacing:.5px}.topbar-actions{display:flex;gap:10px;align-items:center}.main-content{overflow-y:auto;padding:28px;background:var(--bg-base)}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.page-title{font-family:var(--font-heading);font-size:22px;font-weight:700;color:var(--text-primary);letter-spacing:.5px}.page-subtitle{font-size:13px;color:var(--text-muted);margin-top:3px}.btn-primary{background:var(--green-dim);border:1.5px solid var(--green);color:#fff;padding:10px 20px;border-radius:var(--radius-sm);font-size:14px;font-weight:700;letter-spacing:.3px;transition:all .15s;white-space:nowrap}.btn-primary:hover:not(:disabled){background:var(--green)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:var(--bg-raised);border:1.5px solid var(--border-bright);color:var(--text-secondary);padding:10px 20px;border-radius:var(--radius-sm);font-size:14px;font-weight:700;transition:all .15s;white-space:nowrap}.btn-secondary:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-danger{background:var(--red-dim);border:1.5px solid var(--red);color:#fff;padding:6px 12px;border-radius:var(--radius-sm);font-size:13px;font-weight:700;transition:all .15s}.btn-danger:hover{background:var(--red)}.btn-ghost{background:none;border:1.5px solid var(--border);color:var(--text-muted);padding:6px 12px;border-radius:var(--radius-sm);font-size:13px;transition:all .15s}.btn-ghost:hover{border-color:var(--border-bright);color:var(--text-secondary)}.btn-gold{background:var(--gold-faint);border:1.5px solid var(--gold-dim);color:var(--gold);padding:10px 20px;border-radius:var(--radius-sm);font-size:14px;font-weight:700;transition:all .15s}.btn-gold:hover{background:var(--gold-dim);color:#fff}.btn-google{width:100%;display:flex;align-items:center;justify-content:center;background:var(--bg-raised);border:1.5px solid var(--border-bright);color:var(--text-primary);padding:12px;border-radius:var(--radius-sm);font-size:15px;font-weight:700;transition:all .15s}.btn-google:hover{background:var(--bg-hover)}.card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;box-shadow:var(--shadow-card);transition:border-color .15s}.card:hover{border-color:var(--border-bright)}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}.input{width:100%;background:var(--bg-raised);border:1.5px solid var(--border);color:var(--text-primary);padding:10px 14px;border-radius:var(--radius-sm);font-size:14px;outline:none;transition:border-color .15s}.input:focus{border-color:var(--border-bright)}.input::placeholder{color:var(--text-muted)}.input-mono{font-family:var(--font-mono);letter-spacing:2px;text-transform:uppercase}select.input{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236a85a8' d='M6 8L0 0h12z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}textarea.input{resize:vertical;min-height:80px}.field{display:flex;flex-direction:column;gap:6px}.field label{font-size:12px;font-weight:700;color:var(--text-muted);letter-spacing:1px;text-transform:uppercase}.badge{display:inline-block;padding:2px 8px;border-radius:99px;font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase}.badge-gold{background:var(--gold-faint);color:var(--gold);border:1px solid var(--gold-dim)}.badge-purple{background:var(--purple-dim);color:#c39bd3}.badge-green{background:var(--green-dim);color:#7dcea0}.badge-blue{background:var(--blue-dim);color:#7fb3d3}.badge-gray{background:var(--bg-raised);color:var(--text-muted);border:1px solid var(--border)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000bf;display:flex;align-items:center;justify-content:center;z-index:100;animation:fadeIn .15s ease}.modal{background:var(--bg-surface);border:1px solid var(--border-bright);border-radius:var(--radius-lg);padding:28px;width:100%;max-width:520px;box-shadow:var(--shadow-modal);animation:slideUp .2s ease}.modal-wide{max-width:720px}.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.modal-title{font-family:var(--font-heading);font-size:18px;font-weight:700;color:var(--text-primary)}.modal-close{background:none;border:none;color:var(--text-muted);font-size:22px;line-height:1;padding:2px 6px;border-radius:var(--radius-sm);transition:color .15s}.modal-close:hover{color:var(--text-primary)}.modal-body{display:flex;flex-direction:column;gap:16px}.modal-footer{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(16px);opacity:0}to{transform:translateY(0);opacity:1}}.class-code{font-family:var(--font-mono);font-size:26px;font-weight:600;color:var(--gold);letter-spacing:6px;cursor:pointer;transition:color .15s;-webkit-user-select:all;user-select:all}.class-code:hover{color:#fff}.class-code-hint{font-size:11px;color:var(--text-muted);margin-top:2px}.question-row{display:flex;align-items:flex-start;gap:12px;padding:12px 14px;background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--radius-sm)}.question-row:hover{border-color:var(--border-bright)}.question-num{font-family:var(--font-mono);font-size:11px;color:var(--text-muted);min-width:24px;padding-top:2px}.question-body{flex:1;min-width:0}.question-prompt{font-size:14px;color:var(--text-primary);margin-bottom:4px}.question-meta{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.question-answer{font-family:var(--font-mono);font-size:12px;color:var(--green);background:var(--green-dim);padding:1px 8px;border-radius:4px}.question-type{font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}.empty-state-icon{font-size:48px;margin-bottom:14px}.empty-state-title{font-size:18px;color:var(--text-secondary);margin-bottom:8px}.empty-state-sub{font-size:14px;margin-bottom:20px}.toggle{position:relative;display:inline-block;width:40px;height:22px}.toggle input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--bg-active);border:1px solid var(--border-bright);border-radius:99px;cursor:pointer;transition:.2s}.toggle-slider:before{content:"";position:absolute;height:14px;width:14px;left:3px;bottom:3px;background:var(--text-muted);border-radius:50%;transition:.2s}.toggle input:checked+.toggle-slider{background:var(--green-dim);border-color:var(--green)}.toggle input:checked+.toggle-slider:before{transform:translate(18px);background:var(--green)}.toggle-row{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-secondary)}.set-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:18px;display:flex;flex-direction:column;gap:10px;transition:border-color .15s,box-shadow .15s;cursor:pointer}.set-card:hover{border-color:var(--border-bright);box-shadow:0 0 0 1px var(--border-bright)}.set-card.selected{border-color:var(--gold-dim);box-shadow:0 0 0 1px var(--gold-dim)}.set-card-title{font-family:var(--font-heading);font-size:15px;font-weight:600;color:var(--text-primary)}.set-card-desc{font-size:13px;color:var(--text-muted)}.set-card-footer{display:flex;gap:8px;align-items:center;margin-top:auto}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg-base);padding:20px}.login-card{width:100%;max-width:400px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px 32px;box-shadow:var(--shadow-modal)}.login-brand{text-align:center;margin-bottom:28px}.login-quill{font-size:28px;color:var(--gold);display:block;margin-bottom:6px}.login-title{font-family:var(--font-display);font-size:26px;color:var(--gold);letter-spacing:2px}.login-sub{font-size:12px;color:var(--text-muted);letter-spacing:2px;text-transform:uppercase;margin-top:6px}.login-divider{text-align:center;position:relative;margin:18px 0}.login-divider:before{content:"";position:absolute;top:50%;left:0;right:0;height:1px;background:var(--border)}.login-divider span{position:relative;background:var(--bg-surface);padding:0 12px;font-size:12px;color:var(--text-muted)}.login-form{display:flex;flex-direction:column;gap:12px}.login-form .btn-primary{margin-top:4px;width:100%}.login-error{font-size:13px;color:var(--red);text-align:center}.login-toggle{text-align:center;font-size:13px;color:var(--text-muted);margin-top:16px}.login-toggle button{background:none;border:none;color:var(--gold-dim);font-size:13px;text-decoration:underline;cursor:pointer}.login-toggle button:hover{color:var(--gold)}.login-note{text-align:center;font-size:12px;color:var(--text-muted);margin-top:20px;padding-top:18px;border-top:1px solid var(--border)}.divider{height:1px;background:var(--border);margin:16px 0}.text-muted{color:var(--text-muted)}.text-gold{color:var(--gold)}.flex-gap{display:flex;gap:10px;align-items:center}.grow{flex:1}