/* Archivo: styles.css */

:root {
    --bg-dark: #070f1e;
    --card-bg: #0b1426;
    --text-main: #c4d1ec;
    --text-muted: #62769f;
    --accent: #00f2fe;
    --accent-glow: rgba(0, 242, 254, 0.2);
    --success: #00ff87;
    --success-bg: rgba(0, 255, 135, 0.1);
    --error: #ff416c;
    --error-bg: rgba(255, 65, 108, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow-x: hidden;
    min-height: 100vh;
    scroll-behavior: smooth;
}

/* Sistema de ¨ªconos flotantes de fondo */
.bg-icons {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

.icon-float {
    position: absolute;
    font-size: 3.5rem;
    color: rgba(0, 242, 254, 0.02);
    animation: advancedFloat 12s linear infinite alternate;
}

@keyframes advancedFloat {
    0% {
        transform: translateY(0) rotate(0deg) scale(0.9);
        color: rgba(0, 242, 254, 0.02);
    }
    50% {
        transform: translateY(-30px) rotate(45deg) scale(1.1);
        color: rgba(0, 242, 254, 0.08);
        text-shadow: 0 0 20px var(--accent-glow);
    }
    100% {
        transform: translateY(15px) rotate(90deg) scale(0.95);
        color: rgba(0, 242, 254, 0.03);
    }
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 50px 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

.logo-area {
    display: inline-flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 12px;
}

.logo-icon {
    font-size: 3rem;
    color: var(--accent);
    animation: neonPulse 2.5s ease-in-out infinite alternate;
}

@keyframes neonPulse {
    0% { transform: scale(1); text-shadow: 0 0 5px var(--accent-glow); }
    100% { transform: scale(1.08); text-shadow: 0 0 25px var(--accent); }
}

h1 {
    font-size: 2.8rem;
    color: #ffffff;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.2rem;
}

/* Barra Navegaci¨®n Superior Estilo Dashboard */
.unit-nav {
    display: table;
    width: 100%;
    background-color: var(--card-bg);
    border-radius: 8px;
    margin-bottom: 40px;
    border: 1px solid rgba(0, 242, 254, 0.08);
}

.nav-link {
    display: table-cell;
    text-align: center;
    padding: 15px 10px;
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: background 0.3s, color 0.3s;
}

.nav-link:hover {
    background: var(--accent-glow);
    color: #fff;
}

/* Tarjetas Informativas */
.card {
    background-color: var(--card-bg);
    border-radius: 14px;
    padding: 35px;
    margin-bottom: 35px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.4);
    border: 1px solid rgba(0, 242, 254, 0.05);
    transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 242, 254, 0.3);
    box-shadow: 0 20px 45px rgba(0, 242, 254, 0.1);
}

h2 {
    color: #ffffff;
    font-size: 1.6rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-icon {
    color: var(--accent);
}

.concept-block {
    background: rgba(255,255,255,0.01);
    padding: 18px;
    border-left: 4px solid var(--accent);
    border-radius: 4px;
    margin-bottom: 25px;
}

p {
    line-height: 1.6;
    font-size: 1.05rem;
}

/* Cajas de desaf¨ªos */
.challenge-box {
    background: rgba(0, 0, 0, 0.3);
    padding: 25px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.03);
}

.badge {
    display: inline-block;
    background: var(--accent-glow);
    color: var(--accent);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
    text-transform: uppercase;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.challenge-desc {
    margin-bottom: 20px;
}

code {
    background: #000000;
    padding: 3px 6px;
    border-radius: 4px;
    color: var(--accent);
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.95rem;
}

/* Botones de Opciones */
.options-container {
    display: block;
}

.option-btn {
    display: block;
    width: 100%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--text-main);
    padding: 16px 20px;
    border-radius: 8px;
    cursor: pointer;
    text-align: left;
    font-size: 1rem;
    margin-bottom: 12px;
    transition: all 0.25s ease;
}

.option-btn:hover {
    background: var(--accent-glow);
    border-color: var(--accent);
    color: #ffffff;
    transform: translateX(6px);
}

.btn-icon {
    color: var(--accent);
    margin-right: 10px;
}

/* Bloques de Resultados Din¨¢micos */
.result-box {
    margin-top: 20px;
    padding: 18px;
    border-radius: 8px;
    line-height: 1.5;
    animation: slideUp 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.result-box.success {
    background: var(--success-bg);
    border: 1px solid var(--success);
    color: #ffffff;
}

.result-box.error {
    background: var(--error-bg);
    border: 1px solid var(--error);
    color: #ffffff;
}

.hidden {
    display: none;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .unit-nav { display: block; }
    .nav-link { display: block; width: 100%; text-align: left; padding: 12px 20px; }
}