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

:root {
    --primary-color: #4CAF50;
    --primary-dark: #388E3C;
    --secondary-color: #2196F3;
    --background-color: #1a1a2e;
    --surface-color: #16213e;
    --sidebar-bg: #0f0f23;
    --text-color: #ffffff;
    --text-muted: #a0a0a0;
    --border-color: #333;
    --success-color: #4CAF50;
    --error-color: #f44336;
    --warning-color: #ff9800;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--background-color), var(--surface-color));
}

.login-box {
    background: var(--surface-color);
    padding: 40px;
    border-radius: 16px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.login-header p {
    color: var(--text-muted);
}

.admin-panel {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    font-size: 20px;
    color: var(--primary-color);
}

.sidebar-header i {
    margin-right: 10px;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(76, 175, 80, 0.1);
    border-left-color: var(--primary-color);
}

.nav-item.active {
    background: rgba(76, 175, 80, 0.2);
    border-left-color: var(--primary-color);
    color: var(--primary-color);
}

.nav-item i {
    width: 20px;
    margin-right: 15px;
}

.sidebar-footer {
    border-top: 1px solid var(--border-color);
    padding: 10px 0;
}

.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
}

.topbar {
    background: var(--surface-color);
    padding: 15px 25px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 20px;
    cursor: pointer;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
}

.content-area {
    flex: 1;
    padding: 25px;
    overflow-y: auto;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.page-title {
    font-size: 24px;
}

.card {
    background: var(--surface-color);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 25px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 18px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.stat-card {
    background: var(--background-color);
    padding: 20px;
    border-radius: 12px;
    text-align: center;
}

.stat-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 15px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.stat-value {
    font-size: 28px;
    font-weight: bold;
    margin-bottom: 5px;
}

.stat-label {
    color: var(--text-muted);
    font-size: 14px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: var(--background-color);
    font-weight: 600;
}

.data-table tr:hover {
    background: rgba(76, 175, 80, 0.05);
}

.table-actions {
    display: flex;
    gap: 10px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 14px;
    text-decoration: none;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.4);
}

.btn-secondary {
    background: var(--background-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
}

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

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-block {
    width: 100%;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 12px 16px;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.alert-success {
    background: rgba(76, 175, 80, 0.2);
    border: 1px solid var(--success-color);
    color: var(--success-color);
}

.alert-error {
    background: rgba(244, 67, 54, 0.2);
    border: 1px solid var(--error-color);
    color: var(--error-color);
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: rgba(76, 175, 80, 0.2);
    color: var(--success-color);
}

.badge-danger {
    background: rgba(244, 67, 54, 0.2);
    color: var(--error-color);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--surface-color);
    border-radius: 16px;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

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

.modal-title {
    font-size: 20px;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 28px;
    cursor: pointer;
    line-height: 1;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.visual-editor {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    min-height: 400px;
    padding: 20px;
    background: var(--background-color);
}

.editor-toolbar {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.editor-toolbar .btn {
    padding: 8px 15px;
}

.component-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.component-item {
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.component-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

.component-item i {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.component-item span {
    display: block;
    font-size: 14px;
}

.preview-area {
    background: white;
    border-radius: 8px;
    padding: 20px;
    min-height: 300px;
    color: #333;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.setting-card {
    background: var(--background-color);
    padding: 20px;
    border-radius: 12px;
}

.setting-card h4 {
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.image-upload {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.image-upload:hover {
    border-color: var(--primary-color);
}

.image-upload i {
    font-size: 40px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.image-preview {
    max-width: 200px;
    max-height: 150px;
    border-radius: 8px;
    margin-top: 10px;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .menu-toggle {
        display: block;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }
}

.rich-editor {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.rich-editor-toolbar {
    background: var(--background-color);
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.rich-editor-toolbar button {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.rich-editor-toolbar button:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.rich-editor-content {
    min-height: 200px;
    padding: 15px;
    background: var(--background-color);
    color: var(--text-color);
}

.rich-editor-content:focus {
    outline: none;
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.switch-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: 0.4s;
    border-radius: 26px;
}

.switch-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.4s;
    border-radius: 50%;
}

.switch input:checked + .switch-slider {
    background-color: var(--primary-color);
}

.switch input:checked + .switch-slider:before {
    transform: translateX(24px);
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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