/**
 * WHITE CRYSTAL Control Panel - Main Stylesheet
 * Dark & Light Theme Design
 * Version: 1.1 (with Theme Switcher)
 * Date: 2025-11-04
 */

/* ====================================
   CSS VARIABLES - DARK THEME (DEFAULT)
   ==================================== */

:root {
    /* Dark theme colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-quaternary: #475569;

    /* Text colors */
    --text-primary: #e2e8f0;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --text-inverse: #0f172a;

    /* Accent colors */
    --accent-blue: #3b82f6;
    --accent-green: #22c55e;
    --accent-red: #ef4444;
    --accent-yellow: #f59e0b;
    --accent-purple: #8b5cf6;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Border radius */
    --border-radius-sm: 4px;
    --border-radius-md: 6px;
    --border-radius-lg: 8px;
    --border-radius-xl: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.35);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.3s ease;
}

/* ====================================
   LIGHT THEME VARIABLES
   ==================================== */

:root[data-theme="light"] {
    /* Light theme colors */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e2e8f0;
    --bg-quaternary: #cbd5e1;

    /* Text colors */
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --text-inverse: #ffffff;

    /* Accent colors remain the same for consistency */
    --accent-blue: #3b82f6;
    --accent-green: #22c55e;
    --accent-red: #ef4444;
    --accent-yellow: #f59e0b;
    --accent-purple: #8b5cf6;

    /* Shadows - lighter for light theme */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

/* ====================================
   RESET & BASE STYLES
   ==================================== */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: var(--transition-normal);
}

a:hover {
    color: #2563eb;
}

/* ====================================
   MAIN CONTAINER & LAYOUT
   ==================================== */

.main-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ====================================
   HEADER
   ==================================== */

.page-header {
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--bg-tertiary);
    padding: var(--spacing-lg) var(--spacing-xl);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
    transition: background var(--transition-normal), border-color var(--transition-normal);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-section i {
    font-size: 36px;
    color: var(--accent-blue);
    animation: gemPulse 2s ease-in-out infinite;
}

@keyframes gemPulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

.page-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: 1px;
}

.subtitle {
    font-size: 12px;
    color: var(--text-muted);
    margin: 0;
}

.header-actions {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

/* ====================================
   THEME SWITCHER
   ==================================== */

.theme-switcher {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.theme-toggle {
    background: var(--bg-tertiary);
    border: 1px solid var(--bg-quaternary);
    color: var(--text-primary);
    padding: 10px 16px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 14px;
    font-weight: 500;
}

.theme-toggle:hover {
    background: var(--bg-quaternary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.theme-toggle i {
    font-size: 16px;
    transition: transform var(--transition-normal);
}

.theme-toggle:hover i {
    transform: rotate(20deg);
}

/* ====================================
   BUTTONS
   ==================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 10px 20px;
    border-radius: var(--border-radius-md);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-normal);
    border: 1px solid transparent;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

.btn-primary:hover {
    background: #2563eb;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-success {
    background: var(--accent-green);
    color: white;
}

.btn-success:hover {
    background: #16a34a;
    transform: translateY(-2px);
}

.btn-danger {
    background: var(--accent-red);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-quaternary);
}

/* ====================================
   FILTERS SECTION
   ==================================== */

.filters-section {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-lg);
    margin: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--bg-tertiary);
    box-shadow: var(--shadow-sm);
    transition: background var(--transition-normal), border-color var(--transition-normal);
}

.search-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 500px;
}

.search-box input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    background: var(--bg-primary);
    border: 1px solid var(--bg-tertiary);
    border-radius: var(--border-radius-lg);
    color: var(--text-primary);
    font-size: 14px;
    transition: var(--transition-normal);
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.controls-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.sort-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.sort-controls label {
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
}

.sort-select {
    background: var(--bg-primary);
    border: 1px solid var(--bg-tertiary);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: var(--border-radius-md);
    font-size: 14px;
    min-width: 180px;
    cursor: pointer;
    transition: var(--transition-normal);
}

.sort-select:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.sort-order-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--bg-quaternary);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
}

.sort-order-btn:hover {
    background: var(--bg-quaternary);
}

/* Category Filters */
.filters-row {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.filter-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--bg-quaternary);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 14px;
}

.filter-btn:hover {
    background: var(--bg-quaternary);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

.active-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    min-height: 20px;
}

/* ====================================
   MAIN CONTENT
   ==================================== */

.main-content {
    flex: 1;
    padding: 0 var(--spacing-xl) var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.projects-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
    font-size: 14px;
}

.projects-stats strong {
    color: var(--accent-blue);
    font-size: 16px;
}

.separator {
    color: var(--text-muted);
}

/* ====================================
   PROJECTS GRID
   ==================================== */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.project-card {
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    opacity: 0;
    transition: var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-blue);
}

.project-card:hover::before {
    opacity: 1;
}

.project-icon {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-lg);
    background: var(--bg-tertiary);
    transition: var(--transition-normal);
}

.project-card:hover .project-icon {
    transform: scale(1.1);
}

.project-icon img {
    width: 64px;
    height: 64px;
    object-fit: contain;
}

.project-icon i {
    font-size: 48px;
    color: var(--accent-blue);
}

.project-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    word-break: break-word;
}

.project-description {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

.project-category {
    display: inline-block;
    padding: 4px 8px;
    background: rgba(59, 130, 246, 0.2);
    color: var(--accent-blue);
    border-radius: var(--border-radius-sm);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: auto;
}

/* ====================================
   LOADING & EMPTY STATES
   ==================================== */

.loading-state {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xl);
    color: var(--text-muted);
    grid-column: 1 / -1;
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--bg-tertiary);
    border-top: 3px solid var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.empty-state {
    text-align: center;
    padding: var(--spacing-xl) * 2;
    color: var(--text-muted);
    grid-column: 1 / -1;
}

.empty-state .empty-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state h3 {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 20px;
}

.empty-state p {
    font-size: 14px;
}

/* ====================================
   FOOTER
   ==================================== */

.page-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--bg-tertiary);
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    transition: background var(--transition-normal), border-color var(--transition-normal);
}

.page-footer p {
    margin: var(--spacing-xs) 0;
}

.footer-link a {
    color: var(--text-secondary);
    margin: 0 var(--spacing-sm);
}

.footer-link a:hover {
    color: var(--accent-blue);
}

/* ====================================
   MODAL
   ==================================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow: auto;
    animation: modalSlideIn 0.3s ease;
    border: 1px solid var(--bg-tertiary);
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    padding: 4px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-body h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.modal-body p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.modal-body hr {
    border: none;
    border-top: 1px solid var(--bg-tertiary);
    margin: var(--spacing-lg) 0;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ====================================
   RESPONSIVE DESIGN
   ==================================== */

@media (max-width: 1200px) {
    .projects-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: var(--spacing-md);
    }

    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }

    .search-row {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        max-width: 100%;
    }

    .controls-group {
        width: 100%;
        justify-content: space-between;
    }

    .filters-section {
        margin: var(--spacing-md);
        padding: var(--spacing-md);
    }

    .main-content {
        padding: 0 var(--spacing-md) var(--spacing-md);
    }

    .projects-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 20px;
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .project-icon {
        width: 60px;
        height: 60px;
    }

    .project-icon img,
    .project-icon i {
        width: 48px;
        height: 48px;
        font-size: 36px;
    }

    .theme-toggle span {
        display: none;
    }
}

/* ====================================
   UTILITY CLASSES
   ==================================== */

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }