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var(--transition-normal)}.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}.stat-valor{font-size:2.5rem;font-weight:800;margin-bottom:.5rem;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.stat-label{font-size:.875rem;color:var(--color-text-light);font-weight:500;text-transform:uppercase;letter-spacing:.05em}.lista-examenes{max-height:600px;overflow-y:auto;margin-bottom:2rem;padding-right:.5rem}.lista-examenes::-webkit-scrollbar{width:8px}.lista-examenes::-webkit-scrollbar-thumb{background-color:var(--color-border);border-radius:4px}.examen-item{background:#fff;padding:1.5rem;border-radius:var(--radius-lg);margin-bottom:1rem;border:1px solid var(--color-border);transition:all 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#f59e0b}.btn-limpiar{width:100%;padding:1rem;background:transparent;color:var(--color-error);border:1px dashed var(--color-error);border-radius:var(--radius-lg);font-size:.9rem;cursor:pointer;opacity:.7;transition:all var(--transition-fast)}.btn-limpiar:hover{opacity:1;background:#fef2f2}.btn-primario{background:var(--color-primary);color:#fff;padding:1rem 2rem;font-size:1rem;border-radius:var(--radius-lg);box-shadow:0 4px 6px -1px #6366f166;font-weight:600;transition:all var(--transition-normal)}.btn-primario:hover{background:var(--color-primary-dark);transform:translateY(-2px);box-shadow:0 10px 15px -3px #6366f180}@media(max-width:768px){.historial-container{padding:20px}.historial-card{padding:1.5rem}.estadisticas-generales{grid-template-columns:1fr}.examen-detalles{flex-direction:column;align-items:flex-start;gap:1rem}.examen-porcentaje{width:100%}}.update-overlay{position:fixed;inset:0;background:#0f172a8c;display:flex;align-items:flex-end;justify-content:center;padding:1.5rem;z-index:500}.update-card{background:#fff;border-radius:2.5rem;padding:2rem;width:100%;max-width:22rem;box-shadow:0 25px 50px -12px #00000040;text-align:center}.update-icon{font-size:3rem;margin-bottom:1rem;line-height:1}.update-title{font-size:1.2rem;font-weight:900;color:#1e293b;margin:0 0 .5rem;text-transform:uppercase;font-style:italic;letter-spacing:-.02em}.update-desc{font-size:.875rem;color:#64748b;font-weight:600;margin:0 0 2rem}.update-btn{width:100%;padding:1rem;background:#4f46e5;color:#fff;border:none;border-radius:1rem;font-weight:900;font-size:.875rem;text-transform:uppercase;letter-spacing:.1em;cursor:pointer;transition:background .2s}.update-btn:hover{background:#4338ca}:root{--color-primary: #6366f1;--color-primary-dark: #4f46e5;--color-secondary: #0ea5e9;--color-success: #10b981;--color-error: #ef4444;--color-text: #1e293b;--color-text-light: #64748b;--color-bg: #f8fafc;--color-surface: #ffffff;--color-border: #e2e8f0;--radius-sm: .5rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-xl: 1.5rem;--shadow-sm: 0 1px 3px 0 rgb(0 0 0 / .1), 0 1px 2px -1px rgb(0 0 0 / .1);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1);--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background-color:var(--color-bg);color:var(--color-text);line-height:1.5;-webkit-font-smoothing:antialiased;min-height:100vh}button{cursor:pointer;border:none;font-family:inherit;font-weight:600;transition:all var(--transition-fast)}button:active{transform:scale(.98)}h1,h2,h3,h4,h5,h6{line-height:1.2;font-weight:700;letter-spacing:-.025em}.app-main-title{font-size:2.5rem;margin-bottom:1rem;text-align:center;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.05em;font-weight:800}