/* Preloader con efecto parallax */
#preloader {
    position: fixed;
    inset: 0;
    z-index: 99999;
    overflow: hidden;
    transition: opacity 0.6s ease, visibility 0.6s ease;
    background-image: url(../img/intro1.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preloader-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.preloader-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    padding: 3px;
    background: transparent;
}

.preloader-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    mask-image: radial-gradient(linear-gradient at center, black 0%, transparent 90%);
    will-change: transform;
    /* Sin transition: el lerp del JS ya maneja la suavidad */
}

.building {
    position: absolute;
    bottom: 0;
    background: linear-gradient(180deg, #2c3e50 0%, #1a252f 100%);
    opacity: 0.8;
    transition: transform 0.1s ease-out;
}

.building-1 {
    left: 5%;
    width: 120px;
    height: 60%;
    clip-path: polygon(0 100%, 0 20%, 20% 15%, 40% 25%, 60% 10%, 80% 20%, 100% 15%, 100% 100%);
}

.building-2 {
    left: 25%;
    width: 150px;
    height: 75%;
    clip-path: polygon(0 100%, 0 10%, 15% 5%, 30% 15%, 50% 8%, 70% 12%, 85% 5%, 100% 10%, 100% 100%);
}

.building-3 {
    right: 10%;
    width: 130px;
    height: 65%;
    clip-path: polygon(0 100%, 0 15%, 25% 10%, 50% 20%, 75% 8%, 100% 15%, 100% 100%);
}

/* Building windows */
.building::before {
    content: '';
    position: absolute;
    inset: 10%;
    background: repeating-linear-gradient(0deg,
            transparent,
            transparent 15px,
            rgba(255, 255, 200, 0.3) 15px,
            rgba(255, 255, 200, 0.3) 20px),
        repeating-linear-gradient(90deg,
            transparent,
            transparent 15px,
            rgba(255, 255, 200, 0.3) 15px,
            rgba(255, 255, 200, 0.3) 20px);
}

/* Content */
.preloader-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 40px;
    max-width: 800px;
}

.preloader-logo {
    margin-bottom: 100px;
}

.preloader-logo img {
    width: 2500px;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
}

.preloader-text h1 {
    color: #ffffff;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 30px;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.3);
    line-height: 1.3;
    letter-spacing: -0.5px;
}

.preloader-btn {
    margin-top: 20px;
}

.preloader-btn .tv-btn-primary {
    background: linear-gradient(135deg, #00a3e0 0%, #0077b6 100%);
    border: none;
    padding: 15px 50px;
    border-radius: 20px 0 20px 0;
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: box-shadow 0.35s ease-out, background 0.35s ease-out, filter 0.35s ease-out;
}

.preloader-btn .tv-btn-primary:hover {
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.45);
    background: linear-gradient(135deg, #00b4f0 0%, #0088cc 100%);
    filter: brightness(1.08);
}

/* Animations */
@keyframes bgMove {

    0%,
    100% {
        transform: translateX(0) translateY(0);
    }

    25% {
        transform: translateX(-2%) translateY(-1%);
    }

    50% {
        transform: translateX(0) translateY(-2%);
    }

    75% {
        transform: translateX(2%) translateY(-1%);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .preloader-text h1 {
        font-size: 1.8rem;
    }

    .preloader-logo img {
        width: 350px;
    }

    .building {
        opacity: 0.5;
    }

    .building-1 {
        width: 80px;
        height: 40%;
    }

    .building-2 {
        width: 100px;
        height: 50%;
    }

    .building-3 {
        width: 90px;
        height: 45%;
    }
}