:root {
    /* Colores Solarized oscuro */
    --base03: #002b36;
    --base02: #073642;
    --base01: #586e75;
    --base00: #657b83;
    --base0: #839496;
    --base1: #93a1a1;
    --yellow: #b58900;
    --orange: #cb4b16;
    --red: #dc322f;
    --magenta: #d33682;
    --violet: #6c71c4;
    --blue: #268bd2;
    --cyan: #2aa198;
    --green: #859900;

    /* Colores y efectos Cyberpunk */
    --cyber-glow: #0ff; /* Cian brillante */
    --cyber-magenta: #f0f; /* Magenta brillante */
    --glitch-animation: glitch 1.5s infinite linear alternate;
}

/* Base del cuerpo */
body {
    font-family: 'Courier New', Courier, monospace;
    background-color: var(--base03);
    color: var(--base1);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    margin: 0;
}

/* Fondo con efecto de "grid" */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle, rgba(42, 161, 152, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.1;
    z-index: -1;
}

/* Encabezado y texto "glitch" */
header {
    margin-bottom: 2rem;
    text-align: center;
}

.glitch-text {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: bold;
    color: var(--cyber-glow);
    text-shadow: 0 0 10px var(--cyber-glow), 0 0 20px var(--cyber-glow);
    animation: var(--glitch-animation);
    position: relative;
    letter-spacing: 0.1em;
}

/* Pseudo-elementos para el efecto de "glitch" */
.glitch-text::before,
.glitch-text::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    clip: rect(0, 900px, 0, 0);
}

.glitch-text::before {
    left: -1px;
    text-shadow: -2px 0 var(--cyber-magenta);
    background: var(--base03);
    animation: glitch-before 1.5s infinite linear alternate;
}

.glitch-text::after {
    left: 1px;
    text-shadow: -2px 0 var(--cyber-glow);
    background: var(--base03);
    animation: glitch-after 1.5s infinite linear alternate;
}

/* Contenedor principal de la lista */
.container {
    width: 100%;
    max-width: 800px;
}

/* Lista de ejercicios */
.exercise-list {
    list-style-type: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.exercise-item {
    background-color: var(--base02);
    border: 1px solid var(--cyan);
    padding: 1.5rem;
    border-radius: 8px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 0 5px var(--cyan);
}

.exercise-item:hover {
    transform: scale(1.05);
    box-shadow: 0 0 15px var(--cyber-glow);
}

.exercise-item a {
    text-decoration: none;
    color: var(--cyan);
    font-size: 1.2rem;
    font-weight: bold;
    display: block;
    text-align: center;
    text-shadow: 0 0 5px var(--cyan);
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.exercise-item a:hover {
    color: var(--cyber-glow);
    text-shadow: 0 0 10px var(--cyber-glow);
}

.no-exercises {
    color: var(--red);
    font-size: 1.2rem;
    text-align: center;
    grid-column: 1 / -1;
}

/* Animaciones */
@keyframes glitch {
    0% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
    100% { transform: translate(0); }
}

@keyframes glitch-before {
    0% { clip: rect(10px, 900px, 50px, 0); }
    20% { clip: rect(100px, 900px, 10px, 0); }
    40% { clip: rect(30px, 900px, 15px, 0); }
    60% { clip: rect(80px, 900px, 10px, 0); }
    80% { clip: rect(10px, 900px, 60px, 0); }
    100% { clip: rect(50px, 900px, 90px, 0); }
}

@keyframes glitch-after {
    0% { clip: rect(50px, 900px, 90px, 0); }
    20% { clip: rect(10px, 900px, 60px, 0); }
    40% { clip: rect(80px, 900px, 10px, 0); }
    60% { clip: rect(30px, 900px, 15px, 0); }
    80% { clip: rect(100px, 900px, 10px, 0); }
    100% { clip: rect(10px, 900px, 50px, 0); }
}