:root {
    --primary: #4a90d9;
    --primary-dark: #357abd;
    --secondary: #6c757d;
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --light: #f8f9fa;
    --dark: #343a40;
    --bg: #1a1a2e;
    --bg-card: #16213e;
    --bg-input: #0f3460;
    --text: #e4e4e4;
    --text-muted: #a0a0a0;
    --border: #2a3f5f;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text);
}

.nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav a {
    color: var(--text-muted);
    transition: color 0.2s;
}

.nav a:hover, .nav a.active {
    color: var(--text);
    text-decoration: none;
}

/* Main content */
.main {
    padding: 2rem 0;
    min-height: calc(100vh - 140px);
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
}

/* Grid */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

/* App card */
.app-card {
    display: flex;
    gap: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.app-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.app-icon {
    width: 64px;
    height: 64px;
    background: var(--bg-input);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.app-info {
    flex: 1;
    min-width: 0;
}

.app-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.app-desc {
    color: var(--text-muted);
    font-size: 0.875rem;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.2;
    box-sizing: border-box;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    color: white;
}

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

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

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

.btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 0.625rem 0.875rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.2);
}

.form-control::placeholder {
    color: var(--text-muted);
}

select.form-control {
    cursor: pointer;
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-check input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    accent-color: var(--primary);
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th, .table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.table th {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.875rem;
}

.table tr:hover {
    background: rgba(255,255,255,0.02);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success {
    background: rgba(40, 167, 69, 0.2);
    color: var(--success);
}

.badge-warning {
    background: rgba(255, 193, 7, 0.2);
    color: var(--warning);
}

.badge-secondary {
    background: rgba(108, 117, 125, 0.2);
    color: var(--secondary);
}

.badge-primary {
    background: rgba(74, 144, 217, 0.2);
    color: var(--primary);
}

.badge-danger {
    background: rgba(220, 53, 69, 0.2);
    color: var(--danger);
}

/* Hide helpers */
.hide-desktop {
    display: none;
}

/* Alert */
.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.alert-success {
    background: rgba(40, 167, 69, 0.15);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert-danger {
    background: rgba(220, 53, 69, 0.15);
    border: 1px solid var(--danger);
    color: var(--danger);
}

.alert-warning {
    background: rgba(255, 193, 7, 0.15);
    border: 1px solid var(--warning);
    color: var(--warning);
}

/* Page header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 600;
}

/* Footer */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 1.5rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Admin sidebar layout */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    padding: 1.5rem 0;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

.sidebar-nav {
    flex: 1;
}

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
}

.lang-switcher {
    display: flex;
    justify-content: center;
}

.lang-select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.9rem;
    cursor: pointer;
    transition: border-color 0.2s;
}

.lang-select:hover {
    border-color: var(--primary);
}

.lang-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(74, 144, 217, 0.2);
}

.lang-select option {
    background: var(--bg-card);
    color: var(--text);
    padding: 0.5rem;
}

.sidebar-header {
    padding: 0 1.5rem 1.5rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1rem;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--text-muted);
    transition: all 0.2s;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
    background: rgba(74, 144, 217, 0.1);
    color: var(--text);
    text-decoration: none;
    border-left: 3px solid var(--primary);
}

.admin-content {
    flex: 1;
    padding: 2rem;
    overflow-x: auto;
}

/* Version list */
.version-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    margin-bottom: 0.5rem;
}

.version-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.version-number {
    font-weight: 600;
    font-size: 1.1rem;
}

.version-meta {
    display: flex;
    gap: 0.5rem;
}

/* News item */
.news-item {
    border-bottom: 1px solid var(--border);
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
}

.news-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.news-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.news-meta {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.news-content {
    line-height: 1.7;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Login page */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
}

.login-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    width: 100%;
    max-width: 400px;
}

.login-title {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

/* Actions */
.actions {
    display: flex;
    gap: 0.5rem;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

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

/* Tabs */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
    overflow-x: auto;
}

.tab {
    padding: 0.75rem 1.5rem;
    color: var(--text-muted);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    transition: all 0.2s;
}

.tab:hover {
    color: var(--text);
    text-decoration: none;
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-count {
    background: var(--bg-input);
    padding: 0.1rem 0.5rem;
    border-radius: 10px;
    font-size: 0.75rem;
    margin-left: 0.5rem;
}

/* Mobile hamburger */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
    .admin-layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border);
        position: relative;
    }

    .sidebar-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding-bottom: 0.75rem;
        margin-bottom: 0;
        border-bottom: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .sidebar-nav {
        display: none;
        flex-direction: column;
        padding: 0;
    }

    .sidebar-nav.open {
        display: flex;
    }

    .sidebar-nav a {
        padding: 0.75rem 1.5rem;
        border-left: none !important;
        border-bottom: 1px solid var(--border);
    }

    .sidebar-nav a:hover, .sidebar-nav a.active {
        border-left: 3px solid var(--primary) !important;
        border-bottom: 1px solid var(--border);
    }

    .sidebar-footer {
        display: none;
        padding: 0.75rem 1.5rem;
    }

    .sidebar-footer.open {
        display: block;
    }

    /* Show mobile-only content */
    .hide-desktop {
        display: block;
    }

    .admin-content {
        padding: 1rem;
    }

    .page-header {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }

    .page-header > div {
        flex-wrap: wrap;
    }

    .page-header .actions {
        flex-wrap: wrap;
    }

    /* Responsive tables */
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .table {
        min-width: 0;
    }

    .table td:last-child {
        display: flex;
        flex-wrap: wrap;
        gap: 0.25rem;
    }

    .table td:last-child form {
        display: inline-flex !important;
    }

    /* Hide columns on mobile */
    .hide-mobile {
        display: none;
    }

    /* Stack actions */
    .actions,
    .action-buttons {
        display: flex;
        flex-wrap: wrap;
        gap: 0.25rem;
    }

    .action-buttons form {
        display: inline-flex !important;
    }

    /* Cards on mobile */
    .card {
        padding: 1rem;
    }

    .card-header {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }

    /* Version items */
    .version-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .version-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    /* Modal on mobile */
    .modal-content {
        width: 95%;
        max-height: 85vh;
        margin: 1rem;
    }

    /* Tabs on mobile */
    .tabs {
        gap: 0;
    }

    .tab {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }

    /* Grid on mobile */
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }

    /* Page title */
    .page-title {
        font-size: 1.4rem;
    }

    /* Buttons full width on mobile */
    .btn-mobile-full {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .admin-content {
        padding: 0.75rem;
    }

    .table th, .table td {
        padding: 0.5rem;
        font-size: 0.85rem;
    }

    .btn-sm {
        padding: 0.2rem 0.5rem;
        font-size: 0.75rem;
    }

    .badge {
        font-size: 0.7rem;
        padding: 0.2rem 0.4rem;
    }
}

/* Version accordion */
.version-accordion {
    border-bottom: 1px solid var(--border);
}

.version-accordion:last-child {
    border-bottom: none;
}

.version-summary {
    display: flex;
    align-items: center;
    padding: 1rem;
    cursor: pointer;
    list-style: none;
    transition: background 0.2s;
}

.version-summary::-webkit-details-marker {
    display: none;
}

.version-summary::before {
    content: '\25B6';
    font-size: 0.7rem;
    margin-right: 0.75rem;
    color: var(--text-muted);
    transition: transform 0.2s;
}

.version-accordion[open] .version-summary::before {
    transform: rotate(90deg);
}

.version-summary:hover {
    background: rgba(255, 255, 255, 0.03);
}

.version-content {
    padding: 0 1rem 1rem 2.25rem;
}

/* Loading overlay */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.loading-overlay.active {
    display: flex;
}

.loading-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem 3rem;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 1rem;
}

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

.loading-text {
    color: var(--text);
    font-size: 1rem;
    font-weight: 500;
}