/* ============================================
   CINEMATIC SPLASH SCREEN (PRELOADER)
   ============================================ */

#splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #000;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1), visibility 1s;
}

/* Atmospheric Layer */
.splash-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at center, transparent 0%, var(--color-neutral-950) 80%),
        repeating-linear-gradient(rgba(255, 255, 255, 0.01) 0px, rgba(255, 255, 255, 0.01) 1px, transparent 1px, transparent 30px);
    z-index: -1;
}

/* Immersive Energy Pulse */
.splash-spotlight {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120vmax;
    height: 120vmax;
    background: radial-gradient(circle,
            rgba(var(--color-primary-rgb, 96, 165, 250), 0.2) 0%,
            rgba(var(--color-primary-rgb, 96, 165, 250), 0.05) 30%,
            transparent 60%);
    opacity: 0;
    animation: energy-throb 6s infinite ease-in-out;
    z-index: -1;
}

/* Digital Scanline Overlay */
.splash-scanline {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.1) 50%);
    background-size: 100% 4px;
    opacity: 0.3;
    pointer-events: none;
    z-index: 10001;
}

#splash-screen.fade-out {
    opacity: 0;
    visibility: hidden;
}

.splash-container {
    text-align: center;
    position: relative;
    max-width: 90vw;
}

.splash-logo-container {
    margin-bottom: var(--space-10);
    position: relative;
    display: inline-block;
}

.splash-logo {
    width: 110px;
    height: 110px;
    border-radius: var(--radius-xl);
    box-shadow: 0 0 60px rgba(var(--color-primary-rgb, 96, 165, 250), 0.4);
    border: 2px solid rgba(255, 255, 255, 0.15);
    opacity: 0;
    transform: scale(0.6);
    animation: logo-ignite 1.5s cubic-bezier(0.2, 0.9, 0.3, 1) forwards;
}

.splash-brand {
    display: flex;
    justify-content: center;
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 10vw, 5rem);
    font-weight: 900;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: var(--space-2);
    perspective: 800px;
    background: linear-gradient(to bottom, #fff 20%, #a5f3fc 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Letter Power-Up Reveal */
.splash-letter {
    display: inline-block;
    opacity: 0;
    /* Start dark */
    transform: translateZ(-50px) translateY(10px);
    animation: letter-ignite 1s cubic-bezier(0.2, 0.9, 0.3, 1) forwards;
}

.splash-letter:nth-child(even) {
    --letter-color: #a855f7;
    /* Purple */
    --letter-glow: rgba(168, 85, 247, 0.8);
}

.splash-letter:nth-child(odd) {
    --letter-color: #06b6d4;
    /* Cyan */
    --letter-glow: rgba(6, 182, 212, 0.8);
}

.splash-tagline {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    letter-spacing: 0.5em;
    color: var(--color-neutral-500);
    text-transform: uppercase;
    opacity: 0;
    transform: translateY(15px);
    animation: tagline-fade-in 1s ease-out 3s forwards;
    margin-top: var(--space-6);
}

.splash-loading-bar {
    width: 240px;
    height: 1px;
    background: rgba(255, 255, 255, 0.05);
    margin: var(--space-12) auto 0;
    position: relative;
    overflow: hidden;
}

.splash-loading-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 60%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    animation: progress-slide 2s infinite ease-in-out;
}

/* Animations Core */
@keyframes logo-ignite {
    0% {
        opacity: 0;
        transform: scale(0.5);
        filter: brightness(0.2) blur(10px);
    }

    60% {
        opacity: 1;
        filter: brightness(2) blur(0px);
        box-shadow: 0 0 100px var(--color-primary);
    }

    100% {
        opacity: 1;
        transform: scale(1);
        filter: brightness(1);
    }
}

@keyframes letter-ignite {
    0% {
        opacity: 0;
        -webkit-text-fill-color: rgba(255, 255, 255, 0.05);
        transform: translateZ(-100px) translateY(20px);
        filter: blur(10px);
    }

    40% {
        opacity: 1;
        -webkit-text-fill-color: var(--letter-color);
        text-shadow:
            0 0 10px var(--letter-glow),
            0 0 20px var(--letter-glow);
        filter: blur(0px);
    }

    100% {
        opacity: 1;
        -webkit-text-fill-color: transparent;
        background: linear-gradient(to bottom, #fff, var(--letter-color));
        background-clip: text;
        -webkit-background-clip: text;
        transform: translateZ(0) translateY(0);
        filter: none;
        text-shadow:
            0 0 5px rgba(255, 255, 255, 0.6),
            0 0 15px var(--letter-glow);
    }
}

@keyframes tagline-fade-in {
    0% {
        opacity: 0;
        transform: translateY(15px);
        letter-spacing: 0.8em;
    }

    100% {
        opacity: 1;
        transform: translateY(0);
        letter-spacing: 0.5em;
    }
}

@keyframes energy-throb {

    0%,
    100% {
        opacity: 0.4;
        transform: translate(-50%, -50%) scale(1);
    }

    50% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

@keyframes progress-slide {
    0% {
        left: -100%;
    }

    100% {
        left: 100%;
    }
}

/* Content State */
#main-content {
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
}

#main-content.visible {
    opacity: 1;
}