/* Shared CSS Variables */
:root {
    --color-primary: #4a90d9;
    --color-primary-hover: #357abd;
    --color-danger: #f44336;
    --color-danger-hover: #d32f2f;
    --color-bg: #fff;
    --color-bg-secondary: #f4f4f4;
    --color-bg-tertiary: #f9f9f9;
    --color-border: #ddd;
    --color-border-light: #e0e0e0;
    --color-text: #333;
    --color-text-secondary: #666;
    --color-text-muted: #888;
    --color-error: #c00;
    --color-success: #4caf50;
    --font-family: sans-serif;
    --font-mono: monospace;
    --max-width: 800px;
    --border-radius: 4px;
    --border-radius-lg: 8px;
}

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

body {
    font-family: var(--font-family);
    max-width: var(--max-width);
    margin: 40px auto;
    padding: 0 20px;
    color: var(--color-text);
    background: var(--color-bg);
}

/* Header Styles */
.header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--color-border-light);
}

.header-left h2 {
    margin: 0 0 4px 0;
    font-size: 20px;
}

.header-left .subtitle {
    font-size: 13px;
    color: var(--color-text-secondary);
}

.header-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
}

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

.username {
    color: var(--color-text-secondary);
    font-size: 14px;
}

.nav-link {
    font-size: 13px;
    color: var(--color-primary);
    text-decoration: none;
}

.nav-link:hover {
    text-decoration: underline;
}

/* Button Styles */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
}

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

.btn-danger:hover:not(:disabled) {
    background: var(--color-danger-hover);
}

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

.btn-secondary:hover:not(:disabled) {
    background: #eee;
}

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

.logout-btn {
    padding: 6px 12px;
    background: var(--color-danger);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 13px;
}

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

/* Form Inputs */
textarea {
    width: 100%;
    padding: 10px;
    font-size: 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    resize: vertical;
    box-sizing: border-box;
    font-family: var(--font-family);
}

textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.query-input {
    height: 80px;
}

.prompt-input {
    height: 120px;
    font-family: var(--font-mono);
    font-size: 13px;
}

select,
input[type="text"] {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 14px;
    box-sizing: border-box;
}

select:focus,
input[type="text"]:focus {
    outline: none;
    border-color: var(--color-primary);
}

select:disabled {
    background: #f0f0f0;
    color: #999;
}

/* Form Group */
.form-group {
    margin-bottom: 15px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--color-text);
    font-size: 14px;
}

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

/* Collapsible Sections */
.collapsible-header {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--color-text-secondary);
    font-size: 14px;
    user-select: none;
    margin: 15px 0 10px;
}

.collapsible-header:hover {
    color: var(--color-text);
}

.collapsible-header .arrow {
    transition: transform 0.2s;
    font-size: 12px;
}

.collapsible-header.expanded .arrow {
    transform: rotate(90deg);
}

.collapsible-content {
    display: none;
    padding: 15px;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--border-radius);
    margin-bottom: 15px;
}

.collapsible-content.show {
    display: block;
}

/* Provider Tabs */
.provider-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.provider-tab {
    padding: 8px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}

.provider-tab:hover {
    border-color: var(--color-primary);
}

.provider-tab.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.provider-tab.unavailable {
    opacity: 0.5;
    cursor: not-allowed;
}

.provider-tab.unavailable:hover {
    border-color: var(--color-border);
}

.provider-tab .status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 6px;
}

.provider-tab .status-dot.available {
    background: var(--color-success);
}

.provider-tab .status-dot.unavailable {
    background: var(--color-danger);
}

/* Model Settings */
.model-settings {
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 15px;
}

.model-settings h4 {
    margin: 0 0 15px 0;
    color: var(--color-text);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.model-settings .badge {
    font-size: 11px;
    background: #e8f5e9;
    color: #2e7d32;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: normal;
}

.model-settings .badge.unavailable {
    background: #ffebee;
    color: #c62828;
}

.model-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.model-grid .form-group {
    margin-bottom: 0;
}

/* Temperature Slider */
.temperature-group {
    margin-top: 15px;
}

.temperature-group label {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.temperature-value {
    font-weight: normal;
    color: var(--color-text-secondary);
    font-size: 13px;
}

input[type="range"] {
    width: 100%;
    margin-top: 8px;
}

/* Document Cards */
.documents-section {
    margin-top: 20px;
}

.documents-header {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--color-text-secondary);
    font-size: 14px;
    user-select: none;
    margin-bottom: 10px;
}

.documents-header:hover {
    color: var(--color-text);
}

.documents-header .arrow {
    transition: transform 0.2s;
    font-size: 12px;
}

.documents-header.expanded .arrow {
    transform: rotate(90deg);
}

.documents-header .count {
    background: var(--color-border-light);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
}

.documents-list {
    display: none;
}

.documents-list.show {
    display: block;
}

.document-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 10px;
}

.document-card:last-child {
    margin-bottom: 0;
}

.document-source {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}

.document-source strong {
    color: var(--color-text-secondary);
}

.document-content {
    font-size: 13px;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg-tertiary);
    padding: 10px;
    border-radius: var(--border-radius);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.no-documents {
    color: var(--color-text-muted);
    font-style: italic;
    font-size: 13px;
}

/* Response Display */
.response-box {
    background: var(--color-bg-secondary);
    padding: 15px;
    border-radius: var(--border-radius);
    white-space: pre-wrap;
    word-wrap: break-word;
    min-height: 50px;
}

.response-box.error {
    color: var(--color-error);
}

/* Loading States */
.loading-providers {
    color: var(--color-text-secondary);
    font-style: italic;
    padding: 20px;
    text-align: center;
}

/* Mode Selector (for Admin Panel) */
.mode-selector {
    display: flex;
    gap: 10px;
    margin: 15px 0;
}

.mode-option {
    flex: 1;
    position: relative;
}

.mode-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.mode-option label {
    display: block;
    padding: 12px 16px;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.mode-option label:hover {
    border-color: var(--color-primary);
    background: #f8fafc;
}

.mode-option input[type="radio"]:checked + label {
    border-color: var(--color-primary);
    background: #e3f2fd;
}

.mode-option .mode-title {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 4px;
}

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

.mode-option input[type="radio"]:checked + label .mode-title {
    color: #1565c0;
}

/* Utility Classes */
.mt-10 {
    margin-top: 10px;
}
.mt-15 {
    margin-top: 15px;
}
.mt-20 {
    margin-top: 20px;
}
.mb-10 {
    margin-bottom: 10px;
}
.mb-15 {
    margin-bottom: 15px;
}

.text-center {
    text-align: center;
}
.text-muted {
    color: var(--color-text-muted);
}
.text-error {
    color: var(--color-error);
}

/* Responsive */
@media (max-width: 600px) {
    body {
        margin: 20px auto;
    }

    .header {
        flex-direction: column;
        gap: 15px;
    }

    .header-right {
        align-items: flex-start;
        width: 100%;
    }

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