:root{--primary: #1a4d2e;--secondary: #c4a035;--background: #f8f6f0;--surface: #ffffff;--text: #1a1a1a;--text-light: #666;--error: #c62828;--success: #2e7d32;--shadow: 0 2px 8px rgba(0,0,0,.1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Source Sans Pro,sans-serif;background:var(--background);color:var(--text);min-height:100vh}h1,h2,h3,h4{font-family:Playfair Display,serif}.navbar{background:var(--primary);padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:100;box-shadow:var(--shadow)}.navbar-logo{color:#fff;font-family:Playfair Display,serif;font-size:1.5rem;font-weight:700;text-decoration:none}.navbar-logo span{color:var(--secondary)}.navbar-links{display:flex;gap:1.5rem}.navbar-links button{background:none;border:none;color:#fffc;font-size:1rem;cursor:pointer;padding:.5rem;transition:.3s}.navbar-links button:hover,.navbar-links button.active{color:var(--secondary)}.hero{text-align:center;padding:4rem 2rem;background:linear-gradient(135deg,var(--primary) 0%,#2a6b3e 100%);color:#fff}.hero h1{font-size:3rem;margin-bottom:1rem}.hero p{font-size:1.25rem;opacity:.9;max-width:600px;margin:0 auto 2rem}.hero .btn-primary{background:var(--secondary);color:var(--primary);padding:1rem 2.5rem;font-size:1.1rem;font-weight:600;border:none;border-radius:8px;cursor:pointer;transition:.3s}.hero .btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 12px #c4a03566}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;max-width:800px;margin:2rem auto}.stat-card{background:var(--surface);padding:1.5rem;border-radius:12px;box-shadow:var(--shadow);text-align:center}.stat-card .number{font-size:2.5rem;font-weight:700;color:var(--primary)}.stat-card .label{color:var(--text-light);font-size:.9rem;text-transform:uppercase;letter-spacing:1px}.materias-section{padding:3rem 2rem;max-width:1200px;margin:0 auto}.materias-section h2{text-align:center;font-size:2rem;margin-bottom:2rem;color:var(--primary)}.materias-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}.materia-card{background:var(--surface);padding:2rem;border-radius:12px;box-shadow:var(--shadow);transition:.3s;cursor:pointer;border:2px solid transparent}.materia-card:hover{transform:translateY(-4px);border-color:var(--secondary)}.materia-card .icon{font-size:3rem;margin-bottom:1rem}.materia-card h3{font-size:1.5rem;margin-bottom:.5rem;color:var(--primary)}.materia-card p{color:var(--text-light);font-size:.9rem}.question-container{max-width:800px;margin:0 auto;padding:2rem}.question-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.question-number{background:var(--primary);color:#fff;padding:.5rem 1rem;border-radius:20px;font-weight:600}.question-category{color:var(--text-light);font-size:.9rem}.question-card{background:var(--surface);padding:2rem;border-radius:12px;box-shadow:var(--shadow);margin-bottom:1.5rem}.question-text{font-size:1.2rem;line-height:1.6;margin-bottom:2rem}.options-grid{display:grid;gap:1rem}.option-btn{display:flex;align-items:center;gap:1rem;padding:1rem 1.5rem;border:2px solid #e0e0e0;border-radius:8px;background:var(--surface);cursor:pointer;transition:.3s;text-align:left;font-size:1rem}.option-btn:hover{border-color:var(--primary);background:#f0f7f2}.option-btn.selected{border-color:var(--primary);background:#e8f5e9}.option-btn.correct{border-color:var(--success);background:#e8f5e9}.option-btn.incorrect{border-color:var(--error);background:#ffebee}.option-btn .letter{width:32px;height:32px;border-radius:50%;background:var(--background);display:flex;align-items:center;justify-content:center;font-weight:600;flex-shrink:0}.option-btn.selected .letter{background:var(--primary);color:#fff}.option-btn.correct .letter{background:var(--success);color:#fff}.option-btn.incorrect .letter{background:var(--error);color:#fff}.navigation-buttons{display:flex;justify-content:space-between;gap:1rem}.nav-btn{padding:.75rem 1.5rem;border:2px solid var(--primary);border-radius:8px;background:transparent;color:var(--primary);font-weight:600;cursor:pointer;transition:.3s}.nav-btn:hover:not(:disabled){background:var(--primary);color:#fff}.nav-btn:disabled{opacity:.5;cursor:not-allowed}.simulacro-header{background:var(--surface);padding:1rem 2rem;box-shadow:var(--shadow);display:flex;justify-content:space-between;align-items:center;position:sticky;top:60px;z-index:50}.timer{font-size:1.5rem;font-weight:700;font-family:Source Sans Pro,monospace;color:var(--primary)}.timer.warning{color:#f57c00}.timer.danger{color:var(--error);animation:pulse 1s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.progress-bar-container{background:var(--surface);padding:1rem 2rem;box-shadow:var(--shadow)}.progress-bar{height:8px;background:#e0e0e0;border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:var(--success);transition:.3s}.results-container{max-width:800px;margin:0 auto;padding:2rem}.results-card{background:var(--surface);padding:2rem;border-radius:12px;box-shadow:var(--shadow);margin-bottom:1.5rem}.results-card h2{color:var(--primary);margin-bottom:1.5rem}.results-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:1rem;margin-bottom:2rem}.result-item{text-align:center;padding:1rem;background:var(--background);border-radius:8px}.result-item .score{font-size:2rem;font-weight:700;color:var(--primary)}.result-item .label{font-size:.85rem;color:var(--text-light)}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:200}.modal{background:var(--surface);padding:2rem;border-radius:12px;max-width:500px;width:90%;box-shadow:0 10px 40px #0003}.modal h3{font-size:1.5rem;color:var(--primary);margin-bottom:1rem}.modal-buttons{display:flex;gap:1rem;justify-content:flex-end;margin-top:1.5rem}.modal-buttons button{padding:.75rem 1.5rem;border-radius:8px;font-weight:600;cursor:pointer;transition:.3s}.modal-buttons .btn-secondary{background:transparent;border:2px solid var(--primary);color:var(--primary)}.modal-buttons .btn-primary{background:var(--primary);border:2px solid var(--primary);color:#fff}.start-screen{text-align:center;padding:3rem 2rem}.start-screen h2{color:var(--primary);margin-bottom:1rem}.start-screen p{color:var(--text-light);margin-bottom:2rem}.progreso-section{padding:3rem 2rem;max-width:1000px;margin:0 auto}.progreso-section h2{text-align:center;font-size:2rem;margin-bottom:2rem;color:var(--primary)}.progreso-card{background:var(--surface);padding:2rem;border-radius:12px;box-shadow:var(--shadow);margin-bottom:1.5rem}.progreso-card h3{color:var(--primary);margin-bottom:1rem}.progreso-item{display:flex;justify-content:space-between;align-items:center;padding:1rem 0;border-bottom:1px solid #e0e0e0}.progreso-item:last-child{border-bottom:none}.footer{background:var(--primary);color:#fff;text-align:center;padding:2rem;margin-top:3rem}.footer p{opacity:.8;font-size:.9rem}@media(max-width:768px){.navbar{padding:1rem}.navbar-logo{font-size:1.2rem}.navbar-links{gap:.5rem}.navbar-links button{font-size:.85rem;padding:.25rem}.hero h1{font-size:2rem}.hero p{font-size:1rem}.simulacro-header{flex-direction:column;gap:1rem}.question-container{padding:1rem}}