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var(--space-lg);flex-direction:column;min-height:auto}.hero-content{max-width:100%}.hero-title{font-size:2.2rem}.hero-subtitle{margin-inline:auto}.hero-actions{justify-content:center}.hero-visual{flex:none}.landing-mock-card{width:280px;padding:var(--space-lg)}.landing-stats{gap:var(--space-lg);margin:0 var(--space-md);flex-wrap:wrap}.landing-features{padding:var(--space-2xl) var(--space-lg)}.landing-why{margin:var(--space-lg);padding:var(--space-lg);flex-direction:column}.why-visual{flex:none;width:100%}.landing-exams{padding:var(--space-2xl) var(--space-lg)}.landing-nav{padding:var(--space-sm) var(--space-md)}.footer-content{gap:var(--space-sm);text-align:center;flex-direction:column}}@media (width<=480px){.hero-title{font-size:1.8rem}.stat-item h2{font-size:1.4rem}.section-title{font-size:1.5rem}.landing-mock-card{width:240px}}.chat-bubble{border-radius:var(--radius-lg);word-break:break-word;max-width:88%;transition:background var(--duration-fast) var(--ease-smooth);padding:14px 18px;font-size:.925rem;line-height:1.65;position:relative}.chat-bubble.user{background:linear-gradient(135deg, var(--accent), var(--accent-hover));color:#fff;border-bottom-right-radius:4px;align-self:flex-end;margin-left:auto;box-shadow:0 4px 14px #6c5ce740}.chat-bubble.ai{background:var(--bg-elevated);color:var(--text-primary);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-bottom-left-radius:4px;align-self:flex-start;width:100%;margin-right:auto}[data-theme=light] .chat-bubble.ai{color:#1e293b;background:#fff;border-color:#e2e8f0;box-shadow:0 2px 8px #0000000d}[data-theme=light] .chat-bubble.user{color:#fff;background:linear-gradient(135deg,#6c5ce7,#5a4bcf)}.markdown-content{color:inherit}.markdown-content p{margin-bottom:.65rem}.markdown-content p:last-child{margin-bottom:0}.markdown-content ul,.markdown-content ol{margin-top:.4rem;margin-bottom:.65rem;padding-left:1.4rem}.markdown-content ul{list-style-type:disc}.markdown-content ol{list-style-type:decimal}.markdown-content li{margin-bottom:.3rem}.markdown-content h1,.markdown-content h2,.markdown-content h3,.markdown-content h4{font-family:var(--font-heading);color:var(--text-primary);margin-top:1.1rem;margin-bottom:.5rem;font-weight:700}[data-theme=light] .markdown-content h1,[data-theme=light] .markdown-content h2,[data-theme=light] .markdown-content h3,[data-theme=light] .markdown-content h4{color:#0f172a}.markdown-content h3{color:var(--accent);border-bottom:1px solid var(--border);padding-bottom:4px}.markdown-content blockquote{border-left:4px solid var(--accent);background:var(--surface-hover);color:var(--text-secondary);border-radius:0 8px 8px 0;margin:10px 0;padding:8px 14px;font-style:italic}.markdown-content table{border-collapse:collapse;width:100%;margin:12px 0;font-size:.85rem}.markdown-content th,.markdown-content td{border:1px solid var(--border);text-align:left;padding:8px 12px}.markdown-content th{background:var(--surface-active);font-weight:600}.markdown-content tr:nth-child(2n){background:var(--surface)}.markdown-content .inline-code{background:var(--surface-hover);color:var(--accent);border-radius:4px;padding:2px 6px;font-size:.85em}.code-block-wrapper{border-radius:var(--radius-md);border:1px solid var(--border);background:var(--bg-tertiary);margin:12px 0;overflow:hidden}[data-theme=light] .code-block-wrapper{background:#f8fafc;border-color:#cbd5e1}.popup-modal-overlay{z-index:9999;padding:var(--space-md);-webkit-backdrop-filter:blur(8px);overscroll-behavior:contain;background:#000000a6;justify-content:center;align-items:center;display:flex;position:fixed;inset:0;overflow-y:auto}.popup-modal-card{background:var(--bg-elevated);width:100%;max-height:85vh;color:var(--text-primary);border:1px solid var(--border);border-radius:var(--radius-xl);padding:var(--space-lg);box-shadow:var(--shadow-xl);flex-direction:column;display:flex;overflow:hidden}[data-theme=light] .popup-modal-card{background:#fff;border-color:#0000001a;box-shadow:0 12px 40px #00000026}.popup-modal-header{padding-bottom:var(--space-sm);margin-bottom:var(--space-md);border-bottom:1px solid var(--border);flex-shrink:0;justify-content:space-between;align-items:center;display:flex}.popup-modal-header h3{font-family:var(--font-heading);color:var(--text-primary);margin:0;font-size:1.15rem;font-weight:700}[data-theme=light] .popup-modal-header h3{color:#0f172a}.popup-modal-close{border-radius:var(--radius-full);background:var(--surface-hover);width:32px;height:32px;color:var(--text-secondary);cursor:pointer;transition:all var(--duration-fast) var(--ease-smooth);border:none;flex-shrink:0;justify-content:center;align-items:center;font-size:1.1rem;display:flex}.popup-modal-close:hover{background:var(--surface-active);color:var(--text-primary)}[data-theme=light] .popup-modal-close{color:#475569;background:#0000000f}[data-theme=light] .popup-modal-close:hover{color:#0f172a;background:#0000001a}.popup-modal-scroll{overscroll-behavior:contain;min-height:0;margin-bottom:var(--space-sm);flex:1;padding-right:4px;overflow-y:auto}.popup-modal-scroll::-webkit-scrollbar{width:6px}.popup-modal-scroll::-webkit-scrollbar-track{background:0 0}.popup-modal-scroll::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:3px}.popup-modal-scroll::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-thumb-hover)}.popup-modal-footer{align-items:center;gap:var(--space-xs);padding-top:var(--space-sm);border-top:1px solid var(--border);flex-shrink:0;display:flex}[data-theme=light] .popup-modal-footer{border-top-color:#00000014}@media (width<=640px){.popup-modal-overlay{padding:var(--space-xs)}.popup-modal-card{max-height:92vh;padding:var(--space-md);border-radius:var(--radius-lg)}.popup-modal-header h3{font-size:1rem}}.splash{z-index:9999;background:var(--bg-primary);flex-direction:column;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.logo-box img{object-fit:contain;width:110px;height:110px;animation:1s infinite alternate pop}h1{color:var(--text-primary);letter-spacing:1px;margin-top:20px;font-size:40px;font-weight:700;animation:1s slide}h1 span{color:var(--accent)}.loader{border:4px solid var(--border);border-top:4px solid var(--accent);border-radius:50%;width:45px;height:45px;margin-top:30px;animation:1s linear infinite spin}@keyframes pop{0%{transform:scale(.9)}to{transform:scale(1.1)}}@keyframes slide{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}