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14px;display:none;position:sticky;top:0}.menu-btn{border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);background:0 0;align-items:center;gap:8px;padding:6px 10px;font-size:13px;display:flex}.mobile-lesson-title{color:var(--text);text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:13px;font-weight:500;overflow:hidden}.lesson-content{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden}.lesson-header{border-bottom:1px solid var(--border-light);padding:20px 24px 16px}.lesson-badge{text-transform:uppercase;letter-spacing:.06em;color:var(--primary);margin-bottom:6px;font-size:11px;font-weight:600}.lesson-heading{margin-bottom:6px;font-size:20px;font-weight:700}.lesson-description{color:var(--muted);font-size:14px;line-height:1.5}.lesson-body{flex-direction:column;gap:20px;padding:20px 24px;display:flex}.video-section{border-radius:var(--radius-sm);overflow:hidden}.video-locked{background:var(--surface-alt);border:1px dashed var(--border);border-radius:var(--radius);text-align:center;color:var(--muted);padding:36px 20px;font-size:14px}.video-locked strong{color:var(--text);margin-bottom:6px;font-size:16px;display:block}.quiz-section{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.quiz-section-header{background:var(--surface-alt);border-bottom:1px solid var(--border-light);justify-content:space-between;align-items:center;padding:12px 16px;display:flex}.quiz-section-title{color:var(--text-secondary);font-size:13px;font-weight:600}.quiz-badge{border-radius:10px;padding:2px 8px;font-size:11px;font-weight:600}.quiz-badge.passed{background:var(--success-light);color:var(--success);border:1px solid var(--success-border)}.quiz-badge.pending{background:var(--warning-light);color:var(--warning);border:1px solid #fed7aa}.quiz-body{padding:16px}.quiz-locked{color:var(--muted);padding:4px 0;font-size:13px}.quiz-passing-note{color:var(--muted);background:var(--surface-alt);border-radius:var(--radius-sm);border-left:3px solid var(--border);margin-bottom:14px;padding:6px 10px;font-size:12px}.quiz-questions{flex-direction:column;gap:16px;display:flex}.quiz-question{border:1px solid var(--border-light);border-radius:var(--radius-sm);background:var(--surface);padding:14px}.quiz-question-text{color:var(--text);margin-bottom:10px;font-size:14px;font-weight:500;line-height:1.5}.quiz-options{flex-direction:column;gap:6px;display:flex}.quiz-option{color:var(--text-secondary);cursor:pointer;border-radius:var(--radius-sm);border:1px solid #0000;align-items:center;gap:10px;padding:8px 10px;font-size:14px;transition:border-color .15s,background .15s;display:flex}.quiz-option:hover{background:var(--primary-light);border-color:#bfdbfe}.quiz-option input[type=radio]{accent-color:var(--primary);flex-shrink:0;width:15px;height:15px}.quiz-actions{align-items:center;gap:12px;margin-top:16px;display:flex}.quiz-btn{background:var(--primary);color:#fff;border-radius:var(--radius-sm);border:none;padding:9px 20px;font-size:14px;font-weight:500;transition:background .15s}.quiz-btn:hover:not(:disabled){background:var(--primary-hover)}.quiz-btn:disabled{opacity:.5;cursor:not-allowed}.quiz-result{border-radius:var(--radius-sm);align-items:center;gap:12px;margin-top:12px;padding:12px 16px;font-size:14px;font-weight:500;display:flex}.quiz-result.passed-result{background:var(--success-light);border:1px solid var(--success-border);color:var(--success)}.quiz-result.failed-result{background:var(--danger-light);color:var(--danger);border:1px solid #fecaca}.quiz-result-icon{font-size:18px}@media (width<=900px){.mobile-header{display:flex}.course-layout{grid-template-columns:1fr}.course-sidebar{z-index:200;background:#0006;padding:0;display:none;position:fixed;inset:0}.course-sidebar.open{display:block}.course-sidebar .sidebar-card{width:min(320px,85vw);height:100%;box-shadow:var(--shadow);border-radius:0;overflow-y:auto}.close-btn{display:flex}}@media (width<=600px){body{font-size:14px}.lesson-header{padding:16px}.lesson-body{gap:16px;padding:16px}.lesson-heading{font-size:18px}.quiz-btn{justify-content:center;width:100%}.quiz-question{padding:12px}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-space-x-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-divide-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}.navbar.svelte-rfuq4y{background:var(--surface);border-bottom:1px solid var(--border);z-index:100;position:sticky;top:0}.navbar.svelte-rfuq4y:before{content:"";background:linear-gradient(90deg, var(--primary) 0%, #6366f1 100%);height:3px;display:block}.nav-inner.svelte-rfuq4y{align-items:center;gap:24px;max-width:1100px;height:56px;margin:0 auto;padding:0 20px;display:flex}.brand.svelte-rfuq4y{flex-shrink:0;align-items:center;gap:8px;text-decoration:none;display:flex}.brand-icon.svelte-rfuq4y{font-size:20px;line-height:1}.brand-name.svelte-rfuq4y{color:var(--text);letter-spacing:-.01em;font-size:16px;font-weight:700}.nav-links.svelte-rfuq4y{flex:1;align-items:center;gap:2px;margin:0;padding:0;list-style:none;display:flex}.nav-link.svelte-rfuq4y{color:var(--muted);border-radius:var(--radius-sm);padding:6px 12px;font-size:14px;font-weight:500;text-decoration:none;transition:color .15s,background .15s}.nav-link.svelte-rfuq4y:hover{color:var(--text);background:var(--bg);text-decoration:none}.nav-link.active.svelte-rfuq4y{color:var(--primary);background:var(--primary-light)}.nav-actions.svelte-rfuq4y{flex-shrink:0;align-items:center;gap:10px;display:flex}.admin-badge.svelte-rfuq4y{color:#92400e;background:#fef3c7;border:1px solid #fde68a;border-radius:4px;padding:3px 8px;font-size:11px;font-weight:600;text-decoration:none}.icon-btn.svelte-rfuq4y{border-radius:var(--radius-sm);padding:4px;font-size:17px;line-height:1;text-decoration:none}.icon-btn.svelte-rfuq4y:hover{background:var(--bg)}.avatar.svelte-rfuq4y{background:var(--primary);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:30px;height:30px;font-size:13px;font-weight:600;display:flex}.user-name.svelte-rfuq4y{color:var(--text-secondary);text-overflow:ellipsis;white-space:nowrap;max-width:120px;font-size:13px;font-weight:500;overflow:hidden}.logout-btn.svelte-rfuq4y{color:var(--muted);border-radius:var(--radius-sm);background:0 0;border:none;padding:6px 8px;font-size:13px}.logout-btn.svelte-rfuq4y:hover{color:var(--danger);background:var(--danger-light)}.btn-enroll.svelte-rfuq4y{background:var(--primary);color:#fff;border-radius:var(--radius-sm);padding:7px 14px;font-size:13px;font-weight:600;text-decoration:none;transition:background .15s}.btn-enroll.svelte-rfuq4y:hover{background:var(--primary-hover);text-decoration:none}.hamburger.svelte-rfuq4y{border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);background:0 0;margin-left:auto;padding:6px 10px;font-size:16px;display:none}.mobile-drawer.svelte-rfuq4y{background:var(--surface);border-top:1px solid var(--border);padding:8px 0 16px}.drawer-link.svelte-rfuq4y{color:var(--text-secondary);text-align:left;cursor:pointer;background:0 0;border:none;width:100%;padding:11px 20px;font-size:14px;font-weight:500;text-decoration:none;transition:background .15s;display:block}.drawer-link.svelte-rfuq4y:hover{background:var(--bg);color:var(--text);text-decoration:none}.drawer-enroll.svelte-rfuq4y{color:var(--primary);font-weight:600}.drawer-divider.svelte-rfuq4y{background:var(--border-light);height:1px;margin:6px 0}.drawer-user.svelte-rfuq4y{align-items:center;gap:12px;padding:12px 20px;display:flex}.avatar-sm.svelte-rfuq4y{background:var(--primary);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;font-size:14px;font-weight:600;display:flex}.drawer-user-name.svelte-rfuq4y{color:var(--text);font-size:14px;font-weight:600}.drawer-user-email.svelte-rfuq4y{color:var(--muted);margin-top:1px;font-size:12px}@media (width<=768px){.nav-links.svelte-rfuq4y,.nav-actions.svelte-rfuq4y{display:none}.hamburger.svelte-rfuq4y{display:flex}}@media (width>=769px){.mobile-drawer.svelte-rfuq4y{display:none}}.app-main.svelte-12qhfyh{width:100%;max-width:1100px;margin:0 auto;padding:24px 20px}@media (width<=768px){.app-main.svelte-12qhfyh{padding:14px 12px}}