/* CacheHub - Luxury Cloud Storage dAPP
 * Modern UI with Glass-morphism Effects
 * Luxury Color Palette: #6B7A89 #808080 #675C5A #201E1F
 * Version: 1.0.0
 */

:root {
    /* Luxury Color Palette */
    --slate-primary: #6B7A89;
    --beige-secondary: #808080;
    --taupe-tertiary: #675C5A;
    --charcoal-dark: #201E1F;

    /* Extended Palette */
    --slate-light: #8A9BA8;
    --beige-light: #A0A0A0;
    --taupe-light: #8B7F7D;
    --charcoal-light: #4A4546;

    /* System Colors */
    --success: #28a745;
    --error: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;

    /* Glass-morphism */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Typography */
    --font-primary: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--charcoal-dark);
    background: linear-gradient(135deg, var(--beige-secondary) 0%, var(--slate-primary) 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, var(--slate-primary) 0%, var(--taupe-tertiary) 100%);
    color: white;
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    filter: drop-shadow(var(--shadow-md));
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(255, 255, 255, 0.9);
    padding: var(--spacing-xs);
}

.logo:hover {
    transform: scale(1.08) rotate(2deg);
    filter: drop-shadow(var(--shadow-lg));
}

.brand-name {
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.brand-name:hover {
    color: var(--beige-secondary);
    transform: translateY(-1px);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
    opacity: 0.9;
}

.nav-link:hover {
    opacity: 1;
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.15);
    font-weight: 600;
}

.admin-nav {
    display: none;
}

/* Main Container */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

/* Analytics Dashboard */
.analytics-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.analytics-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--charcoal-dark);
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.analytics-subtitle {
    font-size: 1.1rem;
    color: var(--taupe-tertiary);
    max-width: 600px;
    margin: 0 auto;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--glass-shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--slate-primary), var(--beige-secondary));
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(255, 255, 255, 0.3);
}

.stat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.stat-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--taupe-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-icon {
    font-size: 1.5rem;
    opacity: 0.8;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--charcoal-dark);
    margin-bottom: var(--spacing-sm);
    display: block;
}

.stat-change {
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.stat-change.positive {
    color: var(--success);
}

.stat-change.negative {
    color: var(--error);
}

/* Charts Container */
.charts-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

@media (min-width: 768px) {
    .charts-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

.chart-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--glass-shadow);
    transition: all 0.3s ease;
}

.chart-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.chart-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--charcoal-dark);
}

.chart-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.chart-control-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.1);
    color: var(--charcoal-dark);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.2s ease;
}

.chart-control-btn:hover {
    background: var(--beige-secondary);
    border-color: var(--taupe-tertiary);
}

.chart-control-btn.active {
    background: var(--slate-primary);
    color: white;
    border-color: var(--slate-primary);
}

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

/* Activity Feed */
.activity-feed {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--glass-shadow);
}

.activity-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.activity-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--charcoal-dark);
}

.activity-list {
    max-height: 400px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.activity-item:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--glass-border);
}

.activity-icon {
    font-size: 1.2rem;
    min-width: 24px;
}

.activity-content {
    flex: 1;
}

.activity-description {
    font-size: 0.9rem;
    color: var(--charcoal-dark);
    margin-bottom: var(--spacing-xs);
}

.activity-time {
    font-size: 0.8rem;
    color: var(--taupe-tertiary);
}

/* Loading and Error States */
.loading-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--taupe-tertiary);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--glass-border);
    border-top: 4px solid var(--slate-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

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

.error-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--error);
}

.error-state .error-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.7;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--slate-primary), var(--taupe-tertiary));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--beige-secondary);
    color: var(--charcoal-dark);
    border: 1px solid var(--taupe-tertiary);
}

.btn-secondary:hover {
    background: var(--beige-light);
    border-color: var(--slate-primary);
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .main-container {
        padding: var(--spacing-lg);
    }

    .analytics-title {
        font-size: 2rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .charts-container {
        grid-template-columns: 1fr;
    }

    .chart-card {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .analytics-title {
        font-size: 1.75rem;
    }

    .stat-card {
        padding: var(--spacing-lg);
    }

    .activity-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--beige-light);
}

::-webkit-scrollbar-thumb {
    background: var(--slate-primary);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--taupe-tertiary);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: none;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
}

.modal-content {
    position: relative;
    margin: 5% auto;
    width: 90%;
    max-width: 800px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid #eee;
}

.modal-title {
    margin: 0;
    font-size: 1.2em;
    color: #333;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #666;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.modal-body img,
.modal-body video,
.modal-body audio {
    max-width: 100%;
    max-height: 100%;
}

/* File List Styles */
.file-list {
    padding: 0;
    background: white;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    transition: background-color 0.2s;
}

.file-item:hover {
    background-color: rgba(107, 122, 137, 0.05);
}

.file-item:last-child {
    border-bottom: none;
}

.file-info {
    flex: 1;
}

.file-name {
    font-weight: 500;
    color: #333;
    margin-bottom: 0.25rem;
}

.file-size {
    font-size: 0.875rem;
    color: #666;
}

.file-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    border-radius: 4px;
}

/* Loading and Empty States */
.loading-state,
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: #666;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #6B7A89;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Print Styles */
@media print {
    .header,
    .btn,
    .chart-controls {
        display: none !important;
    }

    body {
        background: white !important;
    }

    .stat-card,
    .chart-card,
    .activity-feed {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
        break-inside: avoid;
    }
}

/* Dropdown Menu Styles */
.action-dropdown {
    position: relative;
    display: inline-block;
}

/* Simple dropdown rules with maximum specificity */
.action-dropdown .dropdown-menu {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    transform: translateY(-10px) !important;
    pointer-events: none !important;
    position: absolute !important;
    right: 0 !important;
    top: 100% !important;
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px) !important;
    border: 2px solid rgba(107, 122, 137, 0.1) !important;
    border-radius: 12px !important;
    box-shadow: 0 8px 32px rgba(107, 122, 137, 0.15) !important;
    min-width: 140px !important;
    z-index: 1000 !important;
    padding: 8px 0 !important;
    transition: all 0.3s ease !important;
}

.action-dropdown .dropdown-menu.show {
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: translateY(0) !important;
    pointer-events: auto !important;
}

.dropdown-trigger {
    background: none;
    border: 2px solid transparent;
    padding: 6px 10px;
    color: var(--slate-primary);
    cursor: pointer;
    font-size: 1.2rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 600;
    display: inline-block;
    line-height: 1;
    min-width: 32px;
    text-align: center;
}

.dropdown-trigger:hover {
    background: rgba(107, 122, 137, 0.1) !important;
    border-color: var(--slate-primary) !important;
    transform: translateY(-1px) !important;
    box-shadow: 0 4px 12px rgba(107, 122, 137, 0.15) !important;
    color: var(--slate-primary) !important;
}

/* Dropdown menu base styles (now handled by more specific rules above) */

.dropdown-item {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 10px 16px;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    color: var(--charcoal-dark);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
    border-radius: 0;
}

.dropdown-item:hover {
    background: rgba(107, 122, 137, 0.1) !important;
    color: var(--slate-primary) !important;
    transform: translateX(2px) !important;
}

.dropdown-item:first-child {
    border-radius: 8px 8px 0 0;
}

.dropdown-item:last-child {
    border-radius: 0 0 8px 8px;
}

.dropdown-item:only-child {
    border-radius: 8px;
}

.dropdown-icon {
    margin-right: 8px;
    font-size: 1rem;
    display: inline-block;
    width: 20px;
    text-align: center;
}

/* Mobile responsiveness for dropdown */
@media (max-width: 768px) {
    .dropdown-menu {
        right: -20px;
        min-width: 130px;
    }

    .dropdown-trigger {
        padding: 4px 8px;
        font-size: 1.1rem;
        min-width: 28px;
    }

    .dropdown-item {
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    .dropdown-icon {
        margin-right: 6px;
        width: 18px;
    }
}

@media (max-width: 480px) {
    .dropdown-menu {
        right: -10px;
        min-width: 120px;
    }
}