:root{--bg: #eef2f7;--bg-soft: #f8fafc;--surface: #ffffff;--surface-2: #f1f5f9;--input: #ffffff;--border: #e2e8f0;--border-strong: #cbd5e1;--text: #0f172a;--text-dim: #475569;--text-faint: #94a3b8;--primary: #4f46e5;--primary-hover: #4338ca;--primary-soft: rgba(79, 70, 229, .09);--violet: #7c3aed;--gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);--success: #16a34a;--danger: #dc2626;--warning: #d97706;--sidebar-w: 264px;--radius-sm: 8px;--radius: 12px;--radius-lg: 18px;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .05);--shadow: 0 14px 34px rgba(15, 23, 42, .1);--shadow-lg: 0 24px 60px rgba(15, 23, 42, .16);--ease: cubic-bezier(.4, 0, .2, 1)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;background-color:var(--bg);background-image:radial-gradient(1200px 600px at 85% -10%,rgba(79,70,229,.07),transparent 60%),radial-gradient(900px 500px at -10% 20%,rgba(124,58,237,.05),transparent 55%);background-attachment:fixed;color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:999px;border:2px solid transparent;background-clip:padding-box}::-webkit-scrollbar-thumb:hover{background:var(--text-faint);background-clip:padding-box}::selection{background:#4f46e52e;color:var(--text)}:focus-visible{outline:2px solid var(--primary);outline-offset:2px}button{font-family:inherit}.btn-primary,.login-submit-btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.85rem 1.75rem;background:var(--gradient);border:none;color:#fff;border-radius:999px;font-weight:600;font-size:1rem;cursor:pointer;transition:transform .18s var(--ease),box-shadow .18s var(--ease),filter .18s var(--ease);box-shadow:0 8px 20px #4f46e547}.btn-primary:hover,.login-submit-btn:hover{transform:translateY(-2px);filter:brightness(1.05);box-shadow:0 12px 28px #4f46e55c}.btn-primary:active,.login-submit-btn:active{transform:translateY(0)}.btn-secondary{padding:.85rem 1.75rem;background:transparent;border:1px solid var(--border-strong);color:var(--text);border-radius:999px;font-weight:600;cursor:pointer;transition:background .2s var(--ease),border-color .2s var(--ease),transform .18s var(--ease)}.btn-secondary:hover{background:var(--surface-2);border-color:var(--primary);transform:translateY(-2px)}.login-btn{background:var(--gradient);color:#fff;border:none;padding:.6rem 1.5rem;border-radius:999px;cursor:pointer;font-weight:600;transition:transform .18s var(--ease),box-shadow .18s var(--ease);box-shadow:0 6px 16px #4f46e547}.login-btn:hover{transform:translateY(-2px);box-shadow:0 10px 22px #4f46e566}.btn-access{display:inline-flex;align-items:center;gap:.4rem;background:var(--primary-soft);color:var(--primary);border:1px solid rgba(79,70,229,.25);padding:.55rem 1.1rem;border-radius:var(--radius-sm);font-weight:600;font-size:.9rem;cursor:pointer;white-space:nowrap;transition:background .2s var(--ease),transform .18s var(--ease)}.btn-access:hover{background:#4f46e529;transform:translateY(-1px)}.btn-edit,.btn-save{display:inline-flex;align-items:center;gap:.3rem;background:#0e74901a;color:#0e7490;border:1px solid rgba(14,116,144,.25);padding:6px 12px;border-radius:var(--radius-sm);cursor:pointer;font-size:.82rem;font-weight:600;margin-right:5px;transition:background .2s var(--ease),transform .15s var(--ease)}.btn-edit:hover,.btn-save:hover{background:#0e74902e;transform:translateY(-1px)}.btn-delete,.btn-cancel{display:inline-flex;align-items:center;gap:.3rem;background:#b91c1c14;color:#b91c1c;border:1px solid rgba(185,28,28,.22);padding:6px 12px;border-radius:var(--radius-sm);cursor:pointer;font-size:.82rem;font-weight:600;transition:background .2s var(--ease),transform .15s var(--ease)}.btn-delete:hover,.btn-cancel:hover{background:#b91c1c29;transform:translateY(-1px)}.btn-small{padding:6px 12px;font-size:.78rem;background:var(--primary);border:none;border-radius:var(--radius-sm);color:#fff;font-weight:600;cursor:pointer;transition:background .2s var(--ease),transform .15s var(--ease)}.btn-small:hover{background:var(--primary-hover);transform:translateY(-1px)}.btn-small.btn-secondary{background:var(--surface-2);border:1px solid var(--border-strong);color:var(--text)}.btn-small.btn-secondary:hover{background:var(--border)}.btn-small:disabled{opacity:.5;cursor:not-allowed}.landing-wrapper{min-height:100vh;display:flex;flex-direction:column}.navbar{display:flex;justify-content:space-between;align-items:center;padding:1.15rem 5%;background:#ffffffb8;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);position:sticky;top:0;z-index:1000;border-bottom:1px solid var(--border)}.logo{font-size:1.4rem;font-weight:800;letter-spacing:-.5px}.logo span{background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.nav-links{display:flex;list-style:none;gap:2rem;align-items:center}.nav-links a{text-decoration:none;color:var(--text-dim);font-weight:500;transition:color .2s var(--ease)}.nav-links a:hover{color:var(--text)}.hero{padding:110px 5% 90px;text-align:center;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;inset:-20%;background:radial-gradient(600px 300px at 50% 0%,rgba(79,70,229,.09),transparent 70%);pointer-events:none}.hero h1{font-size:clamp(2.5rem,6vw,4rem);font-weight:800;letter-spacing:-1.5px;line-height:1.08;margin-bottom:1.4rem;animation:fadeUp .7s var(--ease) both}.hero .highlight{background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero p{color:var(--text-dim);max-width:660px;margin:0 auto 2.6rem;font-size:1.2rem;animation:fadeUp .7s .08s var(--ease) both}.hero-btns{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap;animation:fadeUp .7s .16s var(--ease) both}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.75rem;padding:40px 5% 90px;max-width:1200px;margin:0 auto;width:100%}.card{background:var(--surface);padding:2.4rem;border-radius:var(--radius-lg);border:1px solid var(--border);box-shadow:var(--shadow-sm);transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease)}.card:hover{transform:translateY(-6px);border-color:var(--primary);box-shadow:var(--shadow)}.icon{width:64px;height:64px;display:grid;place-items:center;font-size:1.9rem;background:var(--primary-soft);border-radius:16px;margin-bottom:1.2rem}.card h3{margin-bottom:.6rem;font-size:1.25rem}.card p{color:var(--text-dim);font-size:.95rem}.footer{text-align:center;padding:40px;color:var(--text-dim);border-top:1px solid var(--border);margin-top:auto}.login-container{min-height:100vh;display:flex;justify-content:center;align-items:center;padding:20px}.login-card{background:var(--surface);padding:2.75rem;border-radius:24px;border:1px solid var(--border);width:100%;max-width:460px;box-shadow:var(--shadow-lg);animation:fadeUp .45s var(--ease) both}.login-card h2{margin-bottom:.4rem;font-size:1.7rem;letter-spacing:-.5px}.login-card>p{color:var(--text-dim);margin-bottom:1.75rem;font-size:.95rem}.input-group{margin-bottom:1.2rem;text-align:left}.input-group label{display:block;margin-bottom:.45rem;font-size:.88rem;font-weight:600;color:var(--text-dim)}.input-group input{width:100%;padding:.8rem 1rem;background:var(--input);border:1px solid var(--border-strong);border-radius:var(--radius);color:var(--text);font-size:1rem;outline:none;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}.input-group input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}.login-submit-btn{width:100%;margin-top:.5rem}.back-link{background:none;border:none;color:var(--text-dim);cursor:pointer;font-size:.9rem;margin-bottom:1.5rem;padding:0;display:inline-flex;align-items:center;gap:.4rem;transition:color .2s var(--ease)}.back-link:hover{color:var(--text)}.login-footer{text-align:center;margin-top:1.75rem;font-size:.88rem;color:var(--text-dim)}.toggle-link{color:var(--primary);cursor:pointer;font-weight:600;text-decoration:underline;text-underline-offset:3px;margin-left:4px;transition:color .2s var(--ease)}.toggle-link:hover{color:var(--primary-hover)}.dashboard{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:1.5rem 1rem;position:fixed;inset:0 auto 0 0;height:100vh;z-index:900;transition:width .25s var(--ease)}.sidebar-logo{display:flex;align-items:center;justify-content:space-between;gap:.5rem;font-size:1.35rem;font-weight:800;letter-spacing:-.5px;margin:.25rem .5rem 1.75rem}.sidebar-logo span:not(.logo-mark){background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.side-nav{display:flex;flex-direction:column;gap:3px;flex-grow:1;overflow-y:auto}.nav-section-title{font-size:.7rem;color:var(--text-faint);font-weight:700;margin:1.4rem 0 .4rem .75rem;text-transform:uppercase;letter-spacing:1px}.side-nav a{text-decoration:none;color:var(--text-dim);padding:.7rem .85rem;border-radius:var(--radius-sm);display:flex;align-items:center;gap:10px;font-size:.93rem;transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease)}.side-nav a:hover{background:var(--surface-2);color:var(--text);transform:translate(2px)}.side-nav a.active{background:var(--primary-soft);color:var(--primary);font-weight:600}.my-courses-list{display:flex;flex-direction:column;gap:3px}.no-courses-info{font-size:.82rem;color:var(--text-faint);padding:.3rem .75rem;font-style:italic}.sidebar-footer{padding-top:1rem;border-top:1px solid var(--border)}.sidebar-user-box{display:flex;align-items:center;gap:12px;padding:12px;background:var(--surface-2);border-radius:var(--radius);margin-bottom:14px}.avatar-circle{width:42px;height:42px;border-radius:50%;object-fit:cover;border:2px solid var(--primary);background-color:var(--surface-2);display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0}.user-info-text{display:flex;flex-direction:column;min-width:0}.user-name-small{font-weight:600;font-size:.9rem;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.logout-btn{width:100%;background:transparent;border:1px solid rgba(220,38,38,.35);color:var(--danger);padding:.6rem;border-radius:var(--radius-sm);cursor:pointer;font-weight:600;transition:background .2s var(--ease),color .2s var(--ease)}.logout-btn:hover{background:var(--danger);color:#fff}.main-content{margin-left:var(--sidebar-w);padding:2.25rem;width:calc(100% - var(--sidebar-w));flex:1;min-width:0;transition:margin-left .25s var(--ease),width .25s var(--ease)}.collapse-btn{display:grid;place-items:center;width:30px;height:30px;background:transparent;border:1px solid var(--border-strong);color:var(--text-dim);border-radius:var(--radius-sm);cursor:pointer;font-size:1.05rem;line-height:1;flex-shrink:0;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease)}.collapse-btn:hover{background:var(--primary-soft);color:var(--primary);border-color:var(--primary)}.logo-mark{font-size:1.4rem;line-height:1}.sidebar.collapsed{width:72px;padding:1.25rem .6rem;align-items:center}.sidebar.collapsed+.main-content{margin-left:72px;width:calc(100% - 72px)}.sidebar.collapsed .sidebar-logo{flex-direction:column;justify-content:center;gap:.85rem;width:100%;margin:.25rem 0 1.5rem}.sidebar.collapsed .side-nav{width:100%}.sidebar.collapsed .side-nav a{justify-content:center;padding:.7rem 0;font-size:1.15rem}.sidebar.collapsed .nav-section-title,.sidebar.collapsed .nav-label,.sidebar.collapsed .no-courses-info,.sidebar.collapsed .user-info-text{display:none}.sidebar.collapsed .my-courses-list,.sidebar.collapsed .sidebar-footer{width:100%}.sidebar.collapsed .sidebar-user-box{justify-content:center;padding:10px 4px;margin-bottom:12px}.sidebar.collapsed .logout-btn{display:grid;place-items:center;width:42px;height:40px;padding:0;margin:0 auto;border-radius:var(--radius-sm)}.panel-header{margin-bottom:1.75rem}.panel-header h2{font-size:1.7rem;letter-spacing:-.5px}.user-info{color:var(--text-dim);font-size:.95rem}.admin-form-section{background:var(--surface);padding:1.9rem;border-radius:var(--radius-lg);border:1px solid var(--border);box-shadow:var(--shadow-sm);width:100%;margin-bottom:1.5rem}.admin-form-section h3{margin-bottom:1.5rem;font-size:1.3rem;letter-spacing:-.3px;border-left:4px solid var(--primary);padding-left:.9rem}.section-header-flex{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;gap:1rem;flex-wrap:wrap}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.25rem;margin:1.5rem 0}.stat-card{background:var(--surface);border-radius:var(--radius-lg);border:1px solid var(--border);box-shadow:var(--shadow-sm);padding:1.4rem;text-align:center;transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease)}.stat-card p{color:var(--text-dim);font-size:.78rem;text-transform:uppercase;letter-spacing:1px;margin-bottom:.5rem}.stat-card span,.stat-card h3{font-size:1.9rem;font-weight:800;color:var(--text)}.stat-card:hover{transform:translateY(-4px);border-color:var(--border-strong);box-shadow:var(--shadow)}.stat-card.clickable{cursor:pointer}.stat-card.clickable:hover{border-color:var(--primary)}.stat-card.locked{cursor:not-allowed;opacity:.75}.stat-card.locked:hover{transform:none;border-color:var(--border);box-shadow:var(--shadow-sm)}.stats-grid .stat-card:nth-child(1) span,.stats-grid .stat-card:nth-child(1) h3{color:var(--primary)}.stats-grid .stat-card:nth-child(2) span,.stats-grid .stat-card:nth-child(2) h3{color:var(--success)}.stats-grid .stat-card:nth-child(3) span,.stats-grid .stat-card:nth-child(3) h3{color:var(--warning)}.stats-grid .stat-card:nth-child(4) span,.stats-grid .stat-card:nth-child(4) h3{color:var(--violet)}.admin-form{display:flex;flex-direction:column;gap:1.1rem}.admin-form input,.admin-form select,.admin-form textarea,input[type=text],input[type=email],input[type=password],input[type=file],select,textarea{width:100%;padding:.75rem 1rem;background:var(--input);border:1px solid var(--border-strong);border-radius:var(--radius);color:var(--text);font-size:.95rem;outline:none;font-family:inherit;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}.admin-form input:focus,.admin-form select:focus,.admin-form textarea:focus,input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}.admin-form textarea,textarea{min-height:100px;resize:vertical}.admin-form label,.form-field-group label{display:block;font-size:.85rem;font-weight:600;color:var(--text-dim);margin-bottom:.4rem}select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%234f46e5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .9rem center;background-size:1.1rem;padding-right:2.5rem;cursor:pointer}select option{background-color:var(--surface);color:var(--text)}.search-input{padding:.65rem 1rem;background:var(--input);border:1px solid var(--border-strong);border-radius:var(--radius);color:var(--text);max-width:380px;width:100%}.quiz-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:.5rem}.form-field-group{display:flex;flex-direction:column;gap:5px}.form-field-group label{font-size:.75rem;font-weight:700;color:var(--primary);text-transform:uppercase;letter-spacing:.4px}.radio-group{display:flex;gap:1.5rem;padding:1rem;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius)}.radio-group label{display:flex;align-items:center;gap:.5rem;cursor:pointer}.radio-group input[type=radio]{width:auto;accent-color:var(--primary)}.admin-table-container{width:100%;overflow-x:auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);margin-top:1rem}.admin-table{width:100%;border-collapse:collapse;min-width:560px}.admin-table th,.admin-table td{text-align:left;padding:.85rem .9rem;border-bottom:1px solid var(--border);font-size:.9rem;vertical-align:middle}.admin-table th{background:var(--bg-soft);color:var(--text-faint);font-size:.75rem;text-transform:uppercase;letter-spacing:.5px;white-space:nowrap}.admin-table tbody tr{transition:background .15s var(--ease)}.admin-table tbody tr:nth-child(2n){background:var(--bg-soft)}.admin-table tbody tr:hover{background:var(--primary-soft)}.admin-table tr:last-child td{border-bottom:none}.admin-table input,.admin-table select{padding:6px 10px;background:var(--input);border:1px solid var(--border-strong);border-radius:var(--radius-sm);color:var(--text)}.tag{display:inline-block;padding:3px 10px;border-radius:999px;font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.3px;white-space:nowrap}.tag-pending{background:#d977061f;color:var(--warning);border:1px solid rgba(217,119,6,.3)}.tag-active{background:#16a34a1f;color:var(--success);border:1px solid rgba(22,163,74,.3)}.tag-admin{background:#4f46e51f;color:var(--primary);border:1px solid rgba(79,70,229,.3)}.tag-student{background:#64748b1f;color:var(--text-dim);border:1px solid rgba(100,116,139,.3)}.status-banner{padding:.9rem 1.2rem;border-radius:var(--radius);margin-bottom:1.5rem;font-weight:600;font-size:.92rem;display:flex;align-items:center;gap:10px;animation:fadeUp .3s var(--ease) both}.status-banner.success{background:#16a34a1a;color:#15803d;border:1px solid rgba(22,163,74,.3)}.status-banner.error{background:#dc26261a;color:#b91c1c;border:1px solid rgba(220,38,38,.3)}.pulpit-view{display:flex;flex-direction:column;gap:.5rem}.course-selection{margin-top:.5rem}.course-selection h3{margin-bottom:1rem;font-size:1.2rem}.course-selection .stat-card{text-align:left}.course-selection .stat-card span{font-size:.9rem;color:var(--primary)}.course-title-active{margin:1.25rem 0;color:var(--text);font-size:1.6rem;letter-spacing:-.5px}.materials-list{display:flex;flex-direction:column;gap:.75rem;margin-top:.5rem}.course-row{display:flex;justify-content:space-between;align-items:center;background:var(--surface);padding:1.15rem 1.4rem;border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow-sm);transition:border-color .2s var(--ease),transform .2s var(--ease)}.course-row:hover{border-color:var(--border-strong);transform:translate(2px)}.course-info h4{font-size:1rem;margin-bottom:2px}.course-info p{color:var(--text-dim);font-size:.82rem}.course-quizzes-section{margin-top:2.5rem}.course-quizzes-section h3{padding-bottom:.6rem;border-bottom:1px solid var(--border)}.no-data{color:var(--text-dim);font-style:italic;margin-top:1.5rem}.student-stats-section{margin-bottom:1.5rem}.progress-chart{display:flex;align-items:flex-end;gap:20px;height:180px;padding:28px 12px 10px;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);margin-top:.75rem}.chart-column-wrapper{flex:1;display:flex;flex-direction:column;align-items:center;height:100%;justify-content:flex-end;max-width:52px}.chart-bar{width:100%;border-radius:5px 5px 0 0;position:relative;transition:height .8s var(--ease);min-height:3px}.chart-bar.pass{background:linear-gradient(to top,#15803d,#22c55e);box-shadow:0 0 12px #22c55e4d}.chart-bar.fail{background:linear-gradient(to top,#b91c1c,#ef4444);box-shadow:0 0 12px #ef44444d}.chart-bar:hover{filter:brightness(1.08);cursor:help}.bar-value{position:absolute;top:-24px;left:50%;transform:translate(-50%);font-size:.75rem;font-weight:700;color:var(--text)}.bar-label{margin-top:10px;font-size:.68rem;color:var(--text-dim);text-align:center;white-space:nowrap}.modal-overlay{position:fixed;inset:0;background:#0f172a73;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;justify-content:center;align-items:center;z-index:2000;padding:20px;animation:fadeIn .2s var(--ease) both}.modal-content{background:var(--surface);width:100%;max-width:900px;max-height:88vh;border-radius:var(--radius-lg);padding:2rem;position:relative;overflow-y:auto;border:1px solid var(--border);box-shadow:var(--shadow-lg);animation:fadeUp .3s var(--ease) both}.close-modal{position:absolute;top:1.25rem;right:1.25rem;background:var(--danger);border:none;color:#fff;width:34px;height:34px;border-radius:50%;cursor:pointer;font-size:1.4rem;line-height:1;display:grid;place-items:center;transition:transform .2s var(--ease),filter .2s var(--ease)}.close-modal:hover{transform:rotate(90deg);filter:brightness(1.1)}.html-render{margin-top:1.5rem;color:var(--text);line-height:1.8}.html-render h1,.html-render h2,.html-render h3{color:var(--primary);margin:1rem 0 .5rem}.html-render p{margin-bottom:.9rem}.html-render code{background:var(--surface-2);padding:.2rem .45rem;border-radius:5px;color:var(--warning);font-size:.9em}.html-render img{max-width:100%;border-radius:var(--radius-sm)}.quiz-selection-view h3{margin-bottom:1.25rem;font-size:1.3rem}.quiz-active{max-width:780px;margin:0 auto}.quiz-header{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin-bottom:1.25rem;flex-wrap:wrap}.timer-badge{background:var(--surface);padding:8px 16px;border-radius:var(--radius);font-weight:700;font-family:Inter,ui-monospace,monospace;font-size:1.15rem;border:1px solid var(--border-strong);color:var(--success);font-variant-numeric:tabular-nums}.timer-badge.urgent{color:var(--danger);border-color:var(--danger);animation:pulse 1s infinite}.question-box{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:var(--radius-lg);padding:2rem}.quiz-question-text{font-size:1.2rem;line-height:1.55;margin-bottom:1.75rem}.quiz-image-wrapper{text-align:center;margin-bottom:1.5rem}.quiz-image-wrapper img{max-width:100%;max-height:340px;border-radius:var(--radius);border:1px solid var(--border);transition:transform .2s var(--ease)}.quiz-image-wrapper img:hover{transform:scale(1.015)}.quiz-options-list{display:flex;flex-direction:column;gap:12px}.quiz-option-btn{text-align:left;padding:1rem 1.4rem;background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--radius);color:var(--text);cursor:pointer;font-size:.98rem;transition:border-color .18s var(--ease),background .18s var(--ease),transform .18s var(--ease)}.quiz-option-btn:hover{border-color:var(--primary);background:var(--surface-2)}.quiz-option-btn.selected{background:var(--primary-soft);border-color:var(--primary);box-shadow:0 0 0 1px var(--primary)}.quiz-navigation{display:flex;justify-content:space-between;margin-top:1.5rem;gap:1rem}.quiz-navigation button{padding:.65rem 1.5rem;background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--radius-sm);color:var(--text);cursor:pointer;font-weight:600;transition:background .2s var(--ease),transform .15s var(--ease)}.quiz-navigation button:hover:not(:disabled){background:var(--surface-2);transform:translateY(-1px)}.quiz-navigation button:disabled{opacity:.35;cursor:not-allowed}.quiz-navigation button.btn-save{background:var(--gradient);border:none;color:#fff}.quiz-results h3{margin:1.5rem 0 1rem;font-size:1.3rem}.review-list{margin-top:1rem;display:flex;flex-direction:column;gap:1rem}.review-item{background:var(--surface);padding:1.4rem;border-radius:var(--radius-lg);border:1px solid var(--border);border-left-width:4px;box-shadow:var(--shadow-sm);transition:transform .2s var(--ease)}.review-item:hover{transform:translate(2px)}.correct-border{border-left-color:var(--success)}.wrong-border{border-left-color:var(--danger)}.unanswered-border{border-left-color:var(--text-faint);opacity:.85}.question-number{font-size:.74rem;color:var(--text-faint);text-transform:uppercase;letter-spacing:1px;margin-bottom:4px}.question-text{font-size:1.05rem;margin-bottom:12px;line-height:1.45}.review-item img{max-width:200px;max-height:150px;border-radius:var(--radius-sm);border:1px solid var(--border);margin-bottom:.5rem}.review-options{margin-top:.75rem;display:flex;flex-direction:column;gap:6px}.review-opt{padding:10px 12px;border-radius:var(--radius-sm);background:var(--bg-soft);font-size:.9rem;border:1px solid transparent}.opt-correct{background:#16a34a1f!important;border-color:var(--success);color:#15803d}.opt-wrong{background:#dc26261a!important;border-color:var(--danger);color:#b91c1c}.quiz-result-tag{margin-top:12px;padding:12px;background:#16a34a1a;border-radius:var(--radius-sm);color:var(--success);font-size:.88rem}.quiz-admin-container .admin-table td{vertical-align:middle}.edit-question-box{background:var(--surface-2);padding:1.4rem;border-radius:var(--radius);border:1px solid var(--primary);display:flex;flex-direction:column;gap:14px}.edit-image-input{background:var(--surface-2)!important;border:1px dashed var(--primary)!important;color:var(--primary)!important;font-family:ui-monospace,monospace;font-size:.85rem!important}.edit-image-input::placeholder{color:var(--text-faint)}.row-highlight-warning{background:#d9770614!important;border-left:4px solid var(--warning)}.loader{display:flex;flex-direction:column;align-items:center;gap:1rem;padding:4rem 2rem;color:var(--text-dim)}.loader:before{content:"";width:42px;height:42px;border-radius:50%;border:3px solid var(--border-strong);border-top-color:var(--primary);animation:spin .8s linear infinite}@keyframes fadeUp{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.45}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}@media(max-width:900px){.dashboard{flex-direction:column}.sidebar{position:relative;inset:auto;width:100%;height:auto;padding:.9rem;border-right:none;border-bottom:1px solid var(--border)}.sidebar-logo{margin:.25rem .5rem .75rem;text-align:center}.side-nav{flex-direction:row;overflow-x:auto;padding-bottom:6px;gap:8px}.nav-section-title{display:none}.side-nav a{padding:.5rem 1rem;font-size:.85rem;white-space:nowrap}.sidebar-footer{display:flex;align-items:center;gap:12px;border-top:none}.sidebar-user-box{margin-bottom:0;flex:1}.logout-btn{width:auto;padding:.6rem 1rem}.main-content{margin-left:0;width:100%;padding:1.25rem}}@media(max-width:640px){.nav-links{display:none}.hero{padding:70px 5% 60px}.hero-btns{flex-direction:column;align-items:stretch}.features{padding:20px 5% 60px}.stats-grid,.quiz-grid{grid-template-columns:1fr}.admin-form-section{padding:1.25rem}.admin-table{min-width:480px}.login-card{padding:2rem}.section-header-flex{flex-direction:column;align-items:stretch}.search-input{max-width:none}}@media(max-width:900px){.collapse-btn{display:none}.sidebar.collapsed{width:100%;padding:.9rem;align-items:stretch}.sidebar.collapsed+.main-content{margin-left:0;width:100%}.sidebar.collapsed .sidebar-logo{flex-direction:row;justify-content:center;margin:.25rem .5rem .75rem}.sidebar.collapsed .side-nav a{justify-content:flex-start;padding:.5rem 1rem;font-size:.85rem}.sidebar.collapsed .nav-label{display:inline}.sidebar.collapsed .user-info-text{display:flex}.sidebar.collapsed .sidebar-user-box{justify-content:flex-start;padding:12px}.sidebar.collapsed .logout-btn{display:flex;width:auto;height:auto;padding:.6rem 1rem;margin:0}}