:root {
    --primary: #1e3a5f;
    --accent: #00d4ff;
    --dark: #0a0e17;
    --white: #ffffff;
    --gray-400: #94a3b8;
    --success: #10b981; /* Verde Neón */
    --danger: #ef4444;  /* Rojo Eléctrico */
    --warning: #f59e0b; /* Amarillo Ámbar */
}

body {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    background-color: var(--dark);
    color: var(--white);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

/* Fondos Animados */
.hero-bg { position: fixed; inset: 0; background: radial-gradient(ellipse at 50% 0%, rgba(0, 212, 255, 0.15) 0%, transparent 70%); z-index: -1; }
.hero-grid { position: fixed; inset: 0; background-image: linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px); background-size: 50px 50px; z-index: -1; }

.container {
    background: rgba(20, 27, 45, 0.7);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    max-width: 850px;
    width: 100%;
    margin: auto;
}

.header { border-bottom: 2px solid var(--primary); margin-bottom: 25px; padding-bottom: 15px; display: flex; justify-content: space-between; align-items: center; }

.gradient-text {
    background: linear-gradient(135deg, var(--accent), #7dd3fc);
    -webkit-background-clip: text;
    background-clip: text; /* Corrección para VS Code */
    -webkit-text-fill-color: transparent;
    font-size: 1.5rem;
    font-weight: 800;
}

.stats { font-size: 14px; color: var(--accent); font-weight: bold; }

.question-text { font-size: 1.2rem; font-weight: 600; line-height: 1.6; margin-bottom: 25px; color: var(--white); }
.user-tag { font-size: 11px; color: var(--gray-400); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; display: block; }

/* Opciones Estilo Dark */
.option {
    display: block;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 18px;
    margin-top: 12px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--gray-400);
}

.option:hover { background: rgba(0, 212, 255, 0.08); border-color: var(--accent); color: var(--white); }

.option.selected { border: 2px solid var(--accent) !important; background: rgba(0, 212, 255, 0.15) !important; color: var(--white); }

/* Estados Vibrantes de Validación */
.option.correct { 
    background: rgba(16, 185, 129, 0.2) !important; 
    border: 2px solid var(--success) !important; 
    color: var(--success) !important; 
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.4);
}

.option.incorrect { 
    background: rgba(239, 68, 68, 0.2) !important; 
    border: 2px solid var(--danger) !important; 
    color: var(--danger) !important; 
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
}

.option.missed { 
    background: rgba(245, 158, 11, 0.2) !important; 
    border: 2px solid var(--warning) !important; 
    color: var(--warning) !important; 
    animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 5px rgba(245, 158, 11, 0.4); }
    50% { box-shadow: 0 0 20px rgba(245, 158, 11, 0.7); }
}

.feedback { margin-top: 20px; padding: 15px; border-radius: 10px; background: rgba(255,255,255,0.03); text-align: center; font-weight: bold; }

.controls { margin-top: 35px; display: flex; justify-content: space-between; align-items: center; }

button {
    background: linear-gradient(135deg, var(--accent), var(--primary));
    color: var(--dark);
    border: none;
    padding: 14px 30px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 800;
    text-transform: uppercase;
}

button:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4); }
button:disabled { opacity: 0.2; cursor: not-allowed; }