:root {
    --lila-claro: #e2d4f0;
    --lila: #5f0c57;
    --morado-claro: #59175f;
    --morado: #862566;
    --morado-oscuro: #ce49bcde;
    --morado-profundo: #640f64;
    --sombra: 0 8px 32px rgba(105, 13, 74, 0.37);
}

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

body {
    font-family: "Poppins", sans-serif;
    color: white;
    min-height: 100vh;
    overflow-x: hidden;
    background: linear-gradient(180deg, #1a001f, #3a0a4f 60%, #15001e);
    background-attachment: fixed;
}

.cabecera-principal {
    text-align: center;
    padding: 3rem 0 2rem;
}

.titulo-principal {
    font-family: "Poppins", sans-serif;
    font-size: clamp(1.8rem, 5vw, 2.8rem); 
    font-weight: 700;
    letter-spacing: 1px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    color: var(--lila-claro);
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.titulo-principal::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--morado-claro);
    border-radius: 3px;
}

.contenedor-tarjetas {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    padding: 2rem;
    gap: 2.5rem;
}

.tarjeta-proyecto,
.tarjeta-academica,
.tarjeta-empresas {
    transform-style: preserve-3d;
    min-height: 25vh;
    width: 340px;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    padding: 2.5rem;
    transition: all 0.5s ease;
    position: relative;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: var(--sombra);
}

.tarjeta-proyecto::before,
.tarjeta-academica::before,
.tarjeta-empresas::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, var(--morado-oscuro), #5a104eaf);
    clip-path: circle(20% at 10% 10%);
    z-index: -1;
    transition: all 0.7s ease-out;
    opacity: 0.8;
}

.encabezado-tarjeta {
    text-decoration: none;
    width: 100%;
    text-align: center;
    transition: all 0.5s ease;
}

.titulo-tarjeta {
    font-size: 1.5rem;
    font-weight: 700;
    padding: 1.8rem;
    border-radius: 12px;
    transition: all 0.5s ease;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
    color: white;
    letter-spacing: 0.5px;
    line-height: 1.3;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* Efecto de destello */
.boton-tarjeta::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: 0.5s;
}

.boton-tarjeta:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.boton-tarjeta:hover::before {
    left: 100%;
}

.tarjeta-proyecto:hover::before,
.tarjeta-academica:hover::before,
.tarjeta-empresas:hover::before {
    clip-path: circle(100% at 50% 50%);
    opacity: 0.9;
}

.tarjeta-proyecto:hover .titulo-tarjeta,
.tarjeta-academica:hover .titulo-tarjeta,
.tarjeta-empresas:hover .titulo-tarjeta {
    transform: translateZ(60px);
    background: rgba(255, 255, 255, 0.25);
}

.contenedor-boton {
    width: 100%;
    display: flex;
    justify-content: center;
    margin: 2rem 0 4rem;
    padding: 0 2rem;
}

.boton-home {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--lila-claro);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.5s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.5px;
}

.boton-home:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.2);
    color: white;
}

.boton-home::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: 0.5s;
}

.boton-home:hover::before {
    left: 100%;
}

/* Responsive */
@media (max-width: 1200px) {
    .contenedor-tarjetas {
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .titulo-principal {
        font-size: 2.8rem;
    }

    .contenedor-tarjetas {
        flex-direction: column;
        padding: 1.5rem;
    }

    .tarjeta-proyecto,
    .tarjeta-academica,
    .tarjeta-empresas {
        width: 100%;
        max-width: 400px;
        min-height: 45vh;
        margin-bottom: 1.5rem;
    }
}