/* ============================================
   PRIETO ALIMENTOS - Loading Screen
   Premium Awwwards-worthy loading animation
   ============================================ */

.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--prieto-black);
    z-index: var(--z-loading);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.loading-screen.hidden {
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.6s ease;
}

/* Background grain texture */
.loading-screen::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-size: 256px;
}

/* Animated particles background */
.loading-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.loading-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--prieto-red);
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat 3s infinite;
}

@keyframes particleFloat {
    0% {
        opacity: 0;
        transform: translateY(100vh) scale(0);
    }
    20% {
        opacity: 0.6;
    }
    80% {
        opacity: 0.3;
    }
    100% {
        opacity: 0;
        transform: translateY(-20vh) scale(1);
    }
}

/* Main loading content */
.loading-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2xl);
}

/* Logo container */
.loading-logo-wrapper {
    position: relative;
    width: 180px;
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Rotating ring around logo */
.loading-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 1px solid transparent;
    border-top-color: var(--prieto-red);
    border-right-color: rgba(200, 16, 46, 0.3);
    animation: ringRotate 2s linear infinite;
}

.loading-ring:nth-child(2) {
    width: 85%;
    height: 85%;
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: var(--prieto-red);
    border-left-color: rgba(200, 16, 46, 0.2);
    animation-duration: 3s;
    animation-direction: reverse;
}

@keyframes ringRotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Logo SVG Drawing Animation */
.loading-logo {
    width: 100px;
    height: auto;
    opacity: 0;
    animation: logoReveal 0.8s ease forwards;
    animation-delay: 0.3s;
    filter: brightness(0) invert(1);
}

@keyframes logoReveal {
    0% {
        opacity: 0;
        transform: scale(0.8);
        filter: brightness(0) invert(1) blur(4px);
    }
    100% {
        opacity: 1;
        transform: scale(1);
        filter: brightness(0) invert(1) blur(0);
    }
}

/* Glow behind logo */
.loading-logo-glow {
    position: absolute;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(200, 16, 46, 0.15) 0%, transparent 70%);
    animation: glowPulse 2s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.3);
        opacity: 1;
    }
}

/* Brand text */
.loading-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    opacity: 0;
    animation: fadeSlideUp 0.8s ease forwards;
    animation-delay: 0.8s;
}

.loading-brand-name {
    font-family: var(--font-heading);
    font-size: var(--fs-2xl);
    font-weight: 700;
    color: var(--prieto-white);
    letter-spacing: 8px;
    text-transform: uppercase;
}

.loading-brand-name span {
    display: inline-block;
    opacity: 0;
    transform: translateY(20px);
    animation: letterReveal 0.4s ease forwards;
}

@keyframes letterReveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.loading-brand-tagline {
    font-family: var(--font-accent);
    font-size: var(--fs-sm);
    color: var(--prieto-gray-500);
    font-style: italic;
    letter-spacing: 3px;
    opacity: 0;
    animation: fadeSlideUp 0.6s ease forwards;
    animation-delay: 1.6s;
}

@keyframes fadeSlideUp {
    0% {
        opacity: 0;
        transform: translateY(15px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Progress bar */
.loading-progress-wrapper {
    width: 200px;
    position: relative;
    opacity: 0;
    animation: fadeSlideUp 0.5s ease forwards;
    animation-delay: 1.8s;
}

.loading-progress-track {
    width: 100%;
    height: 1px;
    background: var(--prieto-gray-700);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.loading-progress-bar {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--prieto-red), var(--prieto-red-light));
    border-radius: var(--radius-full);
    transition: width 0.1s linear;
    position: relative;
}

.loading-progress-bar::after {
    content: '';
    position: absolute;
    right: 0;
    top: -2px;
    width: 5px;
    height: 5px;
    background: var(--prieto-red);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--prieto-red);
}

.loading-percentage {
    position: absolute;
    right: 0;
    top: -20px;
    font-family: var(--font-body);
    font-size: 11px;
    color: var(--prieto-gray-500);
    font-weight: 500;
    letter-spacing: 2px;
}

/* Exit animation */
.loading-screen.exit {
    animation: loadingExit 1s cubic-bezier(0.77, 0, 0.175, 1) forwards;
}

.loading-screen.exit .loading-content {
    animation: contentExit 0.5s ease forwards;
}

@keyframes contentExit {
    to {
        opacity: 0;
        transform: scale(0.95);
        filter: blur(10px);
    }
}

@keyframes loadingExit {
    0% {
        clip-path: inset(0 0 0 0);
    }
    100% {
        clip-path: inset(0 0 100% 0);
    }
}

/* Red Flash on exit */
.loading-flash {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--prieto-red);
    z-index: calc(var(--z-loading) - 1);
    opacity: 0;
    pointer-events: none;
}

.loading-flash.active {
    animation: flashEffect 0.8s ease forwards;
}

@keyframes flashEffect {
    0% { opacity: 0; }
    30% { opacity: 0.15; }
    100% { opacity: 0; }
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .loading-logo-wrapper {
        width: 140px;
        height: 140px;
    }
    
    .loading-logo {
        width: 70px;
    }
    
    .loading-brand-name {
        font-size: var(--fs-xl);
        letter-spacing: 6px;
    }
    
    .loading-progress-wrapper {
        width: 150px;
    }
}