/*D:\www\GEDService\PortalCliente\main\static\css\loader.css*/

/* === LOADER OVERLAY MODERNO === */
.loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loader, 9999);
    animation: fadeIn var(--transition-base, 250ms) ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Fallback para navegadores sem backdrop-filter */
@supports not (backdrop-filter: blur(8px)) {
    .loader-overlay {
        background-color: rgba(0, 0, 0, 0.85);
    }
}

/* Container do loader */
.loader-content {
    text-align: center;
    color: #FFFFFF;
    background: rgba(255, 255, 255, 0.1);
    padding: 40px 50px;
    border-radius: var(--radius-lg, 16px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    animation: slideUp 300ms ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

[data-theme="dark"] .loader-content {
    background: rgba(30, 30, 30, 0.9);
    border-color: rgba(255, 255, 255, 0.15);
}

/* === ANIMAÇÃO DE LIVRO === */
.loader {
    width: 60px;
    height: 45px;
    margin: 0 auto 20px;
    perspective: 150px;
}

.book {
    position: relative;
    width: 60px;
    height: 45px;
}

.page {
    display: block;
    width: 30px;
    height: 45px;
    border: 4px solid #FFFFFF;
    border-left: 1px solid #667eea;
    margin: 0;
    position: absolute;
    right: -4px;
    top: -4px;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform-style: preserve-3d;
    transform-origin: left center;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.book .page:nth-child(1) {
    animation: pageTurn 1.2s cubic-bezier(0.4, 0, 0.2, 1) 1.6s infinite;
}

.book .page:nth-child(2) {
    animation: pageTurn 1.2s cubic-bezier(0.4, 0, 0.2, 1) 1.45s infinite;
}

.book .page:nth-child(3) {
    animation: pageTurn 1.2s cubic-bezier(0.4, 0, 0.2, 1) 1.2s infinite;
}

@keyframes pageTurn {
    0% {
        transform: rotateY(0deg);
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    }
    20% {
        background: linear-gradient(135deg, #4b1e77 0%, #764ba2 100%);
    }
    40% {
        background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
        transform: rotateY(-180deg);
    }
    100% {
        background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
        transform: rotateY(-180deg);
    }
}

/* === TEXTO DO LOADER === */
.loader-caption {
    margin-top: 20px;
    font-size: 18px;
    font-weight: 600;
    color: #FFFFFF;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.loader-caption::after {
    content: '';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% {
        content: '';
    }
    40% {
        content: '.';
    }
    60% {
        content: '..';
    }
    80%, 100% {
        content: '...';
    }
}

/* === SPINNER ALTERNATIVO (Círculo) === */
.loader-spinner {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* === LOADER DE PROGRESSO (Barra) === */
.loader-progress {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    margin: 20px auto 0;
    overflow: hidden;
    position: relative;
}

.loader-progress::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg,
        transparent 0%,
        #667eea 50%,
        transparent 100%);
    animation: progress 1.5s ease-in-out infinite;
}

@keyframes progress {
    0% {
        left: -50%;
    }
    100% {
        left: 150%;
    }
}

/* === RESPONSIVO === */
@media (max-width: 768px) {
    .loader-content {
        padding: 30px 40px;
    }

    .loader-caption {
        font-size: 16px;
    }

    .loader {
        width: 50px;
        height: 38px;
    }

    .book {
        width: 50px;
        height: 38px;
    }

    .page {
        width: 25px;
        height: 38px;
    }
}

@media (max-width: 480px) {
    .loader-content {
        padding: 25px 30px;
    }

    .loader-caption {
        font-size: 14px;
    }

    .loader {
        width: 40px;
        height: 30px;
    }

    .book {
        width: 40px;
        height: 30px;
    }

    .page {
        width: 20px;
        height: 30px;
    }
}

/* === MOTION REDUCE === */
@media (prefers-reduced-motion: reduce) {
    .loader-overlay,
    .loader-content,
    .page,
    .loader-spinner,
    .loader-progress::before,
    .loader-caption::after {
        animation: none;
    }

    .loader-spinner {
        border-top-color: #667eea;
        opacity: 0.7;
    }
}

/* === DARK MODE === */
[data-theme="dark"] .loader-overlay {
    background-color: rgba(0, 0, 0, 0.75);
}

[data-theme="dark"] .page {
    border-color: #e0e0e0;
    border-left-color: #4d9aff;
}

[data-theme="dark"] .loader-spinner {
    border-top-color: #4d9aff;
}

[data-theme="dark"] .loader-progress::before {
    background: linear-gradient(90deg,
        transparent 0%,
        #4d9aff 50%,
        transparent 100%);
}