@import "https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700;800&display=swap";:root{--primary:#6366f1;--primary-dark:#4f46e5;--primary-light:#a5b4fc;--primary-soft:#eef2ff;--secondary:#0ea5e9;--success:#10b981;--success-soft:#f0fdf4;--warning:#f59e0b;--warning-soft:#fffbeb;--danger:#ef4444;--danger-soft:#fef2f2;--bg:#f8faff;--bg-card:#fff;--bg-card2:#f1f5f9;--bg-muted:#f8faff;--text:#1e293b;--text-muted:#64748b;--text-light:#94a3b8;--text-heading:#0f172a;--border:#e2e8f0;--border-light:#f1f5f9;--radius:12px;--radius-lg:16px;--radius-sm:8px;--radius-pill:20px;--shadow-xs:0 1px 2px #0000000d;--shadow-sm:0 1px 3px #00000014, 0 1px 2px #0000000f;--shadow:0 4px 12px #00000014, 0 2px 4px #0000000a;--shadow-md:0 8px 24px #0000001a, 0 4px 8px #0000000f;--shadow-lg:0 16px 48px #0000001f, 0 8px 16px #0000000f;--shadow-primary:0 4px 16px #6366f140}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;font-family:Plus Jakarta Sans,Inter,sans-serif;overflow-x:hidden}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-muted)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-light)}.app-layout{min-height:100vh;display:flex}.sidebar{background:var(--bg-card);border-right:1px solid var(--border);z-index:50;flex-direction:column;width:260px;transition:transform .3s;display:flex;position:fixed;top:0;bottom:0;left:0;overflow-y:auto}.sidebar-logo{border-bottom:1px solid var(--border-light);align-items:center;gap:12px;padding:24px 20px 20px;display:flex}.sidebar-logo-icon{background:linear-gradient(135deg, var(--primary), 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var(--border-light);padding:14px}.logout-btn{color:#ef4444;cursor:pointer;background:0 0;border:none;border-radius:9px;align-items:center;gap:10px;width:100%;padding:9px 12px;font-family:inherit;font-size:.875rem;font-weight:500;transition:all .18s;display:flex}.logout-btn:hover{background:var(--danger-soft)}.main-content{background:var(--bg);flex:1;min-height:100vh;margin-left:260px}.page-header{margin-bottom:24px;padding:32px 32px 0}.page-header h2{color:var(--text-heading);letter-spacing:-.4px;font-size:1.6rem;font-weight:800}.page-header p{color:var(--text-muted);margin-top:4px;font-size:.875rem}.page-content{padding:0 32px 32px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:24px;transition:transform .2s,box-shadow 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.btn-primary{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;padding:0;display:flex}.chat-bubble{word-break:break-word;border-radius:16px;max-width:68%;padding:10px 14px;font-size:.875rem;line-height:1.5}.chat-bubble.mine{background:var(--primary);color:#fff;border-bottom-right-radius:4px;align-self:flex-end}.chat-bubble.theirs{color:var(--text);box-shadow:var(--shadow-xs);border:1px solid var(--border);background:#fff;border-bottom-left-radius:4px;align-self:flex-start}.chat-bubble time{opacity:.65;margin-top:4px;font-size:.68rem;display:block}.module-list{flex-direction:column;gap:8px;display:flex}.module-item{border:1px solid var(--border);cursor:pointer;background:#fff;border-left:3px solid #0000;border-radius:10px;align-items:center;gap:14px;padding:14px 16px;transition:all .18s;display:flex}.module-item:hover{background:var(--primary-soft);border-left-color:var(--primary-light)}.module-item.active{background:var(--primary-soft);border-left-color:var(--primary)}.module-item.completed{border-left-color:var(--success);background:var(--success-soft)}.module-icon{background:var(--primary-soft);width:36px;height:36px;color:var(--primary);border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;font-size:1.1rem;display:flex}.section-title{color:var(--text-heading);align-items:center;gap:8px;margin-bottom:16px;font-size:1rem;font-weight:700;display:flex}.flex{display:flex}.flex-between{justify-content:space-between;align-items:center;display:flex}.flex-gap{align-items:center;gap:10px;display:flex}.text-muted{color:var(--text-muted)}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}.divider{border:none;border-top:1px solid var(--border);margin:20px 0}.course-card:hover 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