@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";:root{--bg-primary:#0a0a0a;--bg-secondary:#141414;--text-primary:#f5f5f5;--text-secondary:#a0a0a0;--accent-color:#8b5cf6;--accent-hover:#7c3aed;--danger:#f44;--border-color:#ffffff1a;--glass-bg:#141414b3;--glass-border:#ffffff0d}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;min-height:100vh;font-family:Inter,sans-serif;line-height:1.6;overflow-x:hidden}#root{flex-direction:column;min-height:100vh;display:flex}.glass{background:var(--glass-bg);border:1px solid var(--glass-border);box-shadow:0 8px 32px #0000004d}h1,h2,h3,h4,h5,h6{letter-spacing:-.02em;margin-bottom:1rem;font-weight:600}h1{font-size:2rem}h2{color:var(--accent-color);font-size:1.35rem;line-height:1.4}p{color:var(--text-secondary);margin-bottom:.85rem;font-size:.95rem}.btn{background:var(--bg-secondary);color:var(--text-primary);border:1px solid var(--border-color);cursor:pointer;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-size:.95rem;font-weight:500;transition:all .3s;display:inline-flex}.btn:hover:not(:disabled){border-color:var(--accent-color);background:#8b5cf60d}.btn-primary{background:var(--accent-color);color:#000;border:none;font-weight:600}.btn-primary:hover:not(:disabled){background:var(--accent-hover);box-shadow:0 0 15px #8b5cf666}.btn:disabled{opacity:.5;cursor:not-allowed}.app-container{flex-direction:column;height:100vh;display:flex}.top-nav{border-bottom:1px solid var(--border-color);z-index:50;background-color:var(--bg-primary);flex-wrap:nowrap;gap:.5rem;padding:1rem;display:flex;position:sticky;top:0;overflow-x:auto}.top-nav::-webkit-scrollbar{height:4px}.top-nav::-webkit-scrollbar-track{background:0 0}.top-nav::-webkit-scrollbar-thumb{background:#8b5cf680;border-radius:4px}.nav-item{background:var(--bg-secondary);color:var(--text-secondary);cursor:pointer;border:1px solid #0000;border-radius:6px;flex:auto;justify-content:center;align-items:center;gap:.4rem;padding:.65rem .9rem;font-size:.95rem;transition:all .2s;display:flex}.nav-item:hover:not(:disabled){background-color:var(--accent-color);color:#fff;border-color:var(--accent-color)}.nav-item:hover:not(:disabled) svg{stroke:#fff!important;color:#fff!important}.nav-item.active{color:var(--accent-color);background:#8b5cf61a;border-color:#8b5cf64d}.nav-item.locked{opacity:.4;cursor:not-allowed}.nav-title{text-overflow:ellipsis;white-space:nowrap;max-width:none;display:inline-block;overflow:hidden}.nav-item-final{background-color:var(--accent-color)!important;color:#fff!important}.nav-item-final:hover:not(:disabled){background-color:var(--accent-hover)!important}.nav-item-final.locked{color:#fff9!important;background-color:#8b5cf666!important}.main-content{flex:1;gap:2rem;width:100%;max-width:1400px;margin:0 auto;padding:2rem;display:flex}.home-layout{flex-direction:column;justify-content:flex-start;align-items:center;gap:.5rem;padding-top:1rem}.content-area{flex:1;animation:.4s ease-out fadeIn}.module-card{border-radius:12px;margin-bottom:2rem;padding:2.5rem}.module-text{color:var(--text-primary);font-size:1rem;line-height:1.7}.markdown-body h3{color:var(--accent-color);border-bottom:1px solid var(--border-color);margin-top:2.5rem;margin-bottom:1rem;padding-bottom:.5rem;font-size:1.35rem}.markdown-body h4{color:#fff;border-left:3px solid var(--accent-color);letter-spacing:.02em;background:#8b5cf60d;border-radius:0 6px 6px 0;margin-top:2.5rem;margin-bottom:1rem;padding:.75rem 1rem;font-size:1.15rem}.markdown-body p{color:#d1d5db;margin-bottom:1.25rem}.markdown-body ul{color:#d1d5db;margin-bottom:1.5rem;margin-left:1.5rem}.markdown-body li{margin-bottom:.5rem}.markdown-body strong{color:#fff;font-weight:600}.markdown-body pre{border:1px solid var(--border-color);border-left:4px solid var(--accent-color);background-color:#12121a;border-radius:6px;margin-top:1rem;margin-bottom:1.5rem;padding:1.25rem;overflow-x:auto;box-shadow:0 4px 6px #0000004d}.markdown-body pre code{color:#e2e8f0;font-family:Consolas,Monaco,Courier New,monospace;font-size:.95rem;line-height:1.6}.markdown-body p code,.markdown-body li code{color:#c4b5fd;background-color:#8b5cf626;border-radius:4px;padding:.2rem .4rem;font-family:Consolas,Monaco,Courier New,monospace;font-size:.9em}.exam-container{border-top:1px solid var(--border-color);margin-top:3rem;padding-top:2rem}.question-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;margin-bottom:1.5rem;padding:1.5rem}.options-list{flex-direction:column;gap:.75rem;margin-top:1rem;display:flex}.option-btn{text-align:left;background:var(--bg-primary);border:1px solid var(--border-color);color:var(--text-primary);cursor:pointer;border-radius:6px;padding:1rem;transition:all .2s}.option-btn:hover:not(:disabled){border-color:var(--accent-color)}.option-btn.selected{border-color:var(--accent-color);background:#8b5cf61a}.option-btn.correct{background:#3b82f61a;border-color:#3b82f6}.option-btn.incorrect{border-color:var(--danger);background:#ff44441a}.chat-sidebar{border-radius:12px;flex-direction:column;width:350px;height:calc(100vh - 120px);display:flex;position:sticky;top:100px;overflow:hidden}.chat-home-layout{width:100%;max-width:1000px;height:calc(100vh - 140px);margin:0 auto;position:static}.chat-header{border-bottom:1px solid var(--border-color);background:#8b5cf60d;align-items:center;gap:.5rem;padding:1rem;display:flex}.chat-messages{flex-direction:column;flex:1;gap:1rem;padding:1rem;display:flex;overflow-y:auto}.message{border-radius:8px;max-width:85%;padding:.75rem 1rem;font-size:.9rem}.message.user{background:var(--bg-secondary);border:1px solid var(--border-color);align-self:flex-end}.message.ai{color:#e0e0e0;background:#8b5cf61a;border:1px solid #8b5cf633;align-self:flex-start}.chat-input-area{border-top:1px solid var(--border-color);gap:.5rem;padding:1rem;display:flex}.chat-input-area textarea{background:var(--bg-primary);border:1px solid var(--border-color);color:#fff;border-radius:6px;outline:none;flex:1;padding:.75rem}.chat-input-area textarea:focus{border-color:var(--accent-color)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}