:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e8e8e8;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-muted: #999999;
    --accent: #3390ec;
    --accent-hover: #2b7fd4;
    --danger: #e53935;
    --danger-hover: #c62828;
    --success: #43a047;
    --warning: #fb8c00;
    --border: #e0e0e0;
    --shadow: rgba(0, 0, 0, 0.1);
    --card-bg: #ffffff;
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #252525;
    --bg-tertiary: #333333;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #707070;
    --accent: #4fa3f7;
    --accent-hover: #3390ec;
    --border: #404040;
    --shadow: rgba(0, 0, 0, 0.3);
    --card-bg: #2a2a2a;
}

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

.hidden {
    display: none !important;
}

/* Access denied screen */
.access-denied {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--bg-primary);
}

.access-denied-content {
    text-align: center;
    max-width: 300px;
}

.access-denied-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.access-denied h2 {
    font-size: 24px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.access-denied p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.access-denied-hint {
    font-size: 14px;
    color: var(--text-muted);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background 0.3s, color 0.3s;
}

#app {
    max-width: 100%;
    padding-bottom: 20px;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.admin-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--bg-tertiary);
}

.admin-details {
    display: flex;
    flex-direction: column;
}

.admin-name {
    font-weight: 600;
    font-size: 16px;
}

.admin-id {
    font-size: 12px;
    color: var(--text-muted);
}

.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--bg-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: transform 0.2s, background 0.3s;
}

.theme-toggle:active {
    transform: scale(0.95);
}

/* Navigation */
.nav {
    display: flex;
    gap: 4px;
    padding: 12px;
    background: var(--bg-secondary);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.nav::-webkit-scrollbar {
    display: none;
}

.nav-btn {
    flex-shrink: 0;
    padding: 10px 16px;
    border: none;
    border-radius: 20px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.nav-btn.active {
    background: var(--accent);
    color: white;
}

.nav-btn:not(.active):hover {
    background: var(--bg-tertiary);
}

/* Content */
.content {
    padding: 16px;
}

.tab {
    display: none;
}

.tab.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

h2 {
    font-size: 20px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

/* Settings */
.settings-group {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 16px;
    border: 1px solid var(--border);
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

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

.setting-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.setting-title {
    font-weight: 500;
    font-size: 15px;
}

.setting-desc {
    font-size: 12px;
    color: var(--text-muted);
}

/* Switch */
.switch {
    position: relative;
    width: 52px;
    height: 32px;
    flex-shrink: 0;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-tertiary);
    border-radius: 32px;
    transition: 0.3s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: 0.3s;
    box-shadow: 0 2px 4px var(--shadow);
}

input:checked + .slider {
    background: var(--accent);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

/* Input groups */
.input-group {
    margin-bottom: 16px;
}

.input-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.input-group input,
.input-group select,
.input-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 15px;
    transition: border-color 0.2s;
}

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

.hint {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Buttons */
.btn {
    padding: 14px 24px;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
}

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

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

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

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

.btn-small {
    padding: 8px 16px;
    font-size: 13px;
}

.btn-full {
    width: 100%;
}

.btn:active {
    transform: scale(0.98);
}

/* Add form */
.add-form {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.add-form input {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 15px;
}

.add-form input:focus {
    outline: none;
    border-color: var(--accent);
}

/* Batch add form */
.add-form-batch {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.add-form-batch textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 15px;
    resize: vertical;
    min-height: 100px;
}

.add-form-batch textarea:focus {
    outline: none;
    border-color: var(--accent);
}

/* Items list (stop words, etc.) */
.items-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.item-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 14px;
}

.item-tag .delete-btn {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: none;
    background: var(--danger);
    color: white;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Users list */
.users-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.user-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-info .avatar {
    width: 40px;
    height: 40px;
}

.user-details {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 500;
    font-size: 14px;
}

.user-meta {
    font-size: 12px;
    color: var(--text-muted);
}

.user-badge {
    display: inline-block;
    padding: 2px 8px;
    background: var(--accent);
    color: white;
    border-radius: 10px;
    font-size: 10px;
    margin-left: 8px;
}

/* Subtabs */
.subtabs {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
    padding: 4px;
    background: var(--bg-secondary);
    border-radius: 12px;
}

.subtab-btn {
    flex: 1;
    padding: 10px;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.subtab-btn.active {
    background: var(--card-bg);
    color: var(--text-primary);
    box-shadow: 0 1px 3px var(--shadow);
}

.subtab {
    display: none;
}

.subtab.active {
    display: block;
}

/* Message editor */
.message-editor {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 16px;
}

.message-editor textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 14px;
    resize: vertical;
    font-family: inherit;
}

.message-editor textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.photo-upload {
    margin-top: 12px;
}

.photo-upload label {
    font-size: 13px;
    color: var(--text-secondary);
}

.photo-upload input {
    margin-top: 8px;
}

.upload-progress {
    margin-top: 12px;
}

.upload-progress.hidden {
    display: none;
}

.progress-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 4px;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 12px;
    color: var(--text-secondary);
}

.photo-preview {
    margin-top: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.photo-preview.hidden {
    display: none;
}

.photo-preview img {
    max-width: 120px;
    max-height: 80px;
    border-radius: 8px;
    object-fit: cover;
    border: 1px solid var(--border);
}

/* Request cards */
.request-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
}

.request-card .user-info {
    width: 100%;
}

.request-message {
    margin-top: 8px;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-primary);
    white-space: pre-wrap;
}

.request-actions {
    display: flex;
    gap: 8px;
    width: 100%;
    justify-content: flex-end;
}

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

.btn-success:hover {
    background: #388e3c;
}

/* Requests tabs */
.requests-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.req-tab-btn {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

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

/* Logs */
.logs-filter {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.logs-filter select {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 14px;
}

.logs-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.log-item {
    padding: 12px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.log-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.log-category {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 8px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.log-category.stop_word { background: #ffebee; color: #c62828; }
.log-category.link { background: #e3f2fd; color: #1565c0; }
.log-category.ban { background: #fce4ec; color: #ad1457; }
.log-category.admin { background: #e8f5e9; color: #2e7d32; }
.log-category.settings { background: #fff3e0; color: #e65100; }

[data-theme="dark"] .log-category.stop_word { background: #4a1a1a; }
[data-theme="dark"] .log-category.link { background: #1a3a4a; }
[data-theme="dark"] .log-category.ban { background: #4a1a2e; }
[data-theme="dark"] .log-category.admin { background: #1a3a1a; }
[data-theme="dark"] .log-category.settings { background: #4a3a1a; }

.log-time {
    font-size: 11px;
    color: var(--text-muted);
}

.log-action {
    font-weight: 500;
    font-size: 14px;
    margin-bottom: 4px;
}

.log-details {
    font-size: 13px;
    color: var(--text-secondary);
    word-break: break-word;
}

.log-message {
    margin-top: 8px;
    padding: 8px;
    background: var(--bg-secondary);
    border-radius: 8px;
    font-size: 12px;
    color: var(--text-muted);
    font-style: italic;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 14px 24px;
    background: var(--text-primary);
    color: var(--bg-primary);
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    opacity: 0;
    transition: all 0.3s;
    z-index: 1000;
    max-width: 90%;
    text-align: center;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

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

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

/* Loading state */
.loading {
    display: flex;
    justify-content: center;
    padding: 40px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Empty state */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

/* Responsive adjustments */
@media (max-width: 380px) {
    .nav-btn {
        padding: 8px 12px;
        font-size: 12px;
    }
    
    .content {
        padding: 12px;
    }
    
    .settings-group {
        padding: 12px;
    }
}