:root {
    --bg-color: #0b0f19;
    --card-bg: rgba(21, 27, 44, 0.85); /* Un toque de transparencia para que el fondo se intuya detrás */
    --text-color: #f8fafc;
    --text-muted: #64748b;
    --accent-linux: #38bdf8;
    --accent-blender: #f97316;
    --accent-gimp: #a855f7;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
    position: relative;
    overflow-x: hidden;
}

/* Estilos para congelar el canvas al fondo */
#matrix {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

header {
    text-align: center;
    margin-bottom: 50px;
    z-index: 1;
}

header h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -1.5px;
    margin-bottom: 12px;
    text-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

header h1 span {
    color: var(--accent-linux);
    background: linear-gradient(to right, var(--accent-linux), #60a5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-color);
    opacity: 0.8;
    font-size: 1.15rem;
    font-weight: 600;
}

.container {
    width: 100%;
    max-width: 950px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    z-index: 1;
}

.card {
    background-color: var(--card-bg);
    backdrop-filter: blur(8px); /* Efecto cristal esmerilado espectacular sobre la lluvia de letras */
    -webkit-backdrop-filter: blur(8px);
    border-radius: 20px;
    padding: 35px 30px;
    text-align: center;
    text-decoration: none;
    color: var(--text-color);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    position: relative;
    overflow: hidden;
}

/* Contenedor de Iconos */
.icon-wrapper {
    width: 70px;
    height: 70px;
    margin: 0 auto 25px auto;
    border-radius: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    transition: all 0.3s ease;
}

.card-linux .icon-wrapper { background: rgba(56, 189, 248, 0.1); color: var(--accent-linux); }
.card-blender .icon-wrapper { background: rgba(249, 115, 22, 0.1); color: var(--accent-blender); }
.card-gimp .icon-wrapper { background: rgba(168, 85, 247, 0.1); color: var(--accent-gimp); }

/* Efectos Hover + Brillo Neón */
.card-linux:hover {
    transform: translateY(-8px);
    background-color: rgba(21, 27, 44, 0.95);
    border-color: rgba(56, 189, 248, 0.5);
    box-shadow: 0 15px 35px rgba(56, 189, 248, 0.2), 0 0 15px rgba(56, 189, 248, 0.05);
}
.card-linux:hover .icon-wrapper { background: var(--accent-linux); color: var(--bg-color); transform: scale(1.1); }

.card-blender:hover {
    transform: translateY(-8px);
    background-color: rgba(21, 27, 44, 0.95);
    border-color: rgba(249, 115, 22, 0.5);
    box-shadow: 0 15px 35px rgba(249, 115, 22, 0.2), 0 0 15px rgba(249, 115, 22, 0.05);
}
.card-blender:hover .icon-wrapper { background: var(--accent-blender); color: var(--bg-color); transform: scale(1.1); }

.card-gimp:hover {
    transform: translateY(-8px);
    background-color: rgba(21, 27, 44, 0.95);
    border-color: rgba(168, 85, 247, 0.5);
    box-shadow: 0 15px 35px rgba(168, 85, 247, 0.2), 0 0 15px rgba(168, 85, 247, 0.05);
}
.card-gimp:hover .icon-wrapper { background: var(--accent-gimp); color: var(--bg-color); transform: scale(1.1); }

.card h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 15px;
    letter-spacing: -0.5px;
}

.card-linux h2 { color: var(--accent-linux); }
.card-blender h2 { color: var(--accent-blender); }
.card-gimp h2 { color: var(--accent-gimp); }

.card p {
    color: #e2e8f0;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 30px;
}

/* Botones */
.btn {
    display: block;
    width: 100%;
    padding: 12px 20px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: -0.2px;
    transition: all 0.3s ease;
}

.card-linux .btn { background-color: rgba(56, 189, 248, 0.06); color: var(--accent-linux); border: 1px solid rgba(56, 189, 248, 0.2); }
.card-linux:hover .btn { background-color: var(--accent-linux); color: var(--bg-color); border-color: var(--accent-linux); }

.card-blender .btn { background-color: rgba(249, 115, 22, 0.06); color: var(--accent-blender); border: 1px solid rgba(249, 115, 22, 0.2); }
.card-blender:hover .btn { background-color: var(--accent-blender); color: var(--bg-color); border-color: var(--accent-blender); }

.card-gimp .btn { background-color: rgba(168, 85, 247, 0.06); color: var(--accent-gimp); border: 1px solid rgba(168, 247, 247, 0.2); }
.card-gimp:hover .btn { background-color: var(--accent-gimp); color: var(--bg-color); border-color: var(--accent-gimp); }

footer {
    margin-top: 60px;
    color: var(--text-muted);
    font-size: 0.85rem;
    z-index: 1;
}