/* Enterprise-Grade Dynamic Theme System */

:root {
    /* Theme colors will be overridden by PHP */
    --primary-color: #413c69;
    --secondary-color: #2a2749;
    --accent-color: #9333ea;
    --card-bg: #2c2c44;
    --card-hover: #3a3a55;
    --text-primary: #ffffff;
    --text-secondary: #b8b5ff;
    --border-color: rgba(184, 181, 255, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --success-color: #10b981;
    --error-color: #ef4444;
}

/* Comprehensive Background Application */
body {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%) !important;
    background-attachment: fixed;
    min-height: 100vh;
}

/* Card System */
.pack,
.item-card,
.modal-content,
.admin-card {
    background: var(--card-bg) !important;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px var(--shadow-color);
    transition: all 0.3s ease;
}

.pack:hover,
.item-card:hover {
    background: var(--card-hover) !important;
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--shadow-color);
}

/* Button Theming */
.btn,
.admin-btn,
.generate-btn,
.save-btn {
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color)) !important;
    color: var(--text-primary) !important;
    border: none;
    transition: all 0.3s ease;
}

.btn:hover,
.admin-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(147, 51, 234, 0.4);
    filter: brightness(1.1);
}

/* Text Colors */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary) !important;
}

p, span, div {
    color: var(--text-primary);
}

.subtitle,
.description,
small {
    color: var(--text-secondary) !important;
}

/* Automatic Loading Placeholders and Skeleton Screens */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.4;
    }
    50% {
        opacity: 0.7;
    }
}

/* Loading placeholder for packs */
.pack.loading-placeholder {
    position: relative;
    overflow: hidden;
}

.pack.loading-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.05) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite linear;
    z-index: 1;
}

.pack.loading-placeholder img {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.pack.loaded img {
    opacity: 1;
    animation: fadeIn 0.4s ease;
}

/* Skeleton screen for items */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--card-bg) 25%,
        var(--card-hover) 50%,
        var(--card-bg) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 8px;
}

.skeleton-text {
    height: 14px;
    background: var(--card-hover);
    border-radius: 4px;
    margin: 8px 0;
    animation: pulse 1.5s infinite;
}

.skeleton-image {
    width: 100%;
    height: 150px;
    background: linear-gradient(
        90deg,
        var(--card-hover) 0%,
        rgba(255, 255, 255, 0.1) 50%,
        var(--card-hover) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
    border-radius: 8px;
}

/* Fade in animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Image loading optimization */
img {
    will-change: transform;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* Preload critical images */
.pack img,
.item-card img {
    background: var(--card-hover);
    min-height: 100px;
}

/* Form Elements */
input,
textarea,
select {
    background: rgba(255, 255, 255, 0.1) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
}

input:focus,
textarea:focus,
select:focus {
    background: rgba(255, 255, 255, 0.15) !important;
    border-color: var(--accent-color) !important;
    box-shadow: 0 0 15px rgba(147, 51, 234, 0.3);
}

/* Table Theming */
table {
    background: var(--card-bg) !important;
}

th {
    background: rgba(0, 0, 0, 0.2) !important;
    color: var(--text-primary) !important;
}

td {
    color: var(--text-primary) !important;
    border-color: var(--border-color) !important;
}

tr:hover {
    background: var(--card-hover) !important;
}

/* Modal Theming */
.modal-backdrop {
    background: rgba(0, 0, 0, 0.8) !important;
}

.modal-content {
    background: var(--card-bg) !important;
    border: 2px solid var(--accent-color);
}

/* Navigation Bar */
.navbar,
.admin-header {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color)) !important;
    box-shadow: 0 2px 15px var(--shadow-color);
}

/* Sidebar for Admin */
.admin-sidebar {
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color)) !important;
}

.admin-sidebar .nav-item:hover {
    background: var(--accent-color) !important;
}

/* Scrollbar Theming */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--secondary-color);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-color);
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* Loading States */
.loading,
.spinner {
    border-color: var(--accent-color) !important;
    border-top-color: transparent !important;
}

/* Success/Error States */
.success {
    background: var(--success-color) !important;
    color: white !important;
}

.error {
    background: var(--error-color) !important;
    color: white !important;
}

/* Badges and Tags */
.badge,
.tag {
    background: var(--accent-color) !important;
    color: white !important;
}

/* Progress Bars */
.progress {
    background: var(--secondary-color) !important;
}

.progress-bar {
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color)) !important;
}

/* Tooltips */
.tooltip {
    background: var(--card-bg) !important;
    border: 1px solid var(--accent-color) !important;
    color: var(--text-primary) !important;
}

/* Dropdown Menus */
.dropdown-menu {
    background: var(--card-bg) !important;
    border: 1px solid var(--border-color) !important;
}

.dropdown-item:hover {
    background: var(--card-hover) !important;
}

/* Pagination */
.pagination .page-link {
    background: var(--card-bg) !important;
    color: var(--text-primary) !important;
    border-color: var(--border-color) !important;
}

.pagination .page-link:hover {
    background: var(--accent-color) !important;
}

/* Alerts */
.alert {
    background: var(--card-bg) !important;
    border-color: var(--accent-color) !important;
    color: var(--text-primary) !important;
}

/* Code Blocks */
pre, code {
    background: rgba(0, 0, 0, 0.3) !important;
    color: var(--text-secondary) !important;
}

/* Selection */
::selection {
    background: var(--accent-color);
    color: white;
}

/* Focus Outline */
*:focus {
    outline-color: var(--accent-color) !important;
}

/* Animations */
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 var(--accent-color); }
    70% { box-shadow: 0 0 0 10px rgba(147, 51, 234, 0); }
    100% { box-shadow: 0 0 0 0 rgba(147, 51, 234, 0); }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Enterprise-grade responsive adjustments */
@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 13px;
    }
}