:root {
    /* Light theme colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] {
    /* Dark theme colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #475569;
    --accent-color: #60a5fa;
    --accent-hover: #3b82f6;
    --success-color: #34d399;
    --warning-color: #fbbf24;
    --error-color: #f87171;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle, .settings-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.theme-toggle:hover, .settings-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    transform: translateY(-1px);
}

/* Main Content */
.main-content {
    flex: 1;
    max-width: 1600px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

/* Prompt Section */
.prompt-section {
    margin-bottom: 2rem;
}

.prompt-container {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
}

.button-stack {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: stretch;
}

.prompt-input {
    flex: 1;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    font-size: 1rem;
    color: var(--text-primary);
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
    transition: all 0.2s ease;
}

.prompt-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.send-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.send-btn:hover:not(:disabled) {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-lg);
}

.send-btn:disabled {
    background-color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
}

.clear-btn {
    background-color: var(--error-color);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.clear-btn:hover {
    background-color: #dc2626;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-lg);
}

/* Responses Section */
.ai-responses {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.ai-column {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: visible;
    transition: all 0.3s ease;
    height: fit-content;
    margin-bottom: 40px;
}

/* Removed hover effects to prevent interference with copy button hover */

.ai-header {
    background-color: var(--bg-tertiary);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    border-radius: 16px 16px 0 0;
    border-bottom: 1px solid var(--border-color);
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    width: 100%;
}

.ai-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.ai-controls {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
    flex: 0 1 auto;
}

.model-selector, .provider-selector {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 120px;
}

.model-selector:focus, .provider-selector:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.1);
}

.model-selector:hover, .provider-selector:hover {
    border-color: var(--accent-color);
}

.ai-title {
    font-weight: 600;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1 1 auto;
    min-width: 140px;
}

.ai-column[data-ai="chatgpt"] .ai-title {
    color: var(--success-color);
}

.ai-column[data-ai="claude"] .ai-title {
    color: #d97757;
}

.ai-column[data-ai="grok"] .ai-title {
    color: var(--warning-color);
}

.ai-column[data-ai="gemini"] .ai-title {
    color: var(--accent-color);
}

.provider-logo {
    height: 1.2em;
    width: auto;
    vertical-align: middle;
    display: inline-block;
    margin-right: 0.5rem;
    object-fit: contain;
}

.ai-status {
    font-size: 0.875rem;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-weight: 500;
}

.ai-controls .row-top {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.5rem;
    width: 100%;
}

.ai-controls .row-selects {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.5rem;
    width: 100%;
    flex-wrap: wrap;
}

.ai-status.ready {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.ai-status.loading {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.ai-status.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
}

.ai-response {
    padding: 1.5rem;
    min-height: 200px;
}

.response-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: var(--text-muted);
    text-align: center;
}

.response-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.response-entry {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    animation: fadeIn 0.5s ease;
}

.response-entry:last-child {
    margin-bottom: 0;
    border-bottom: none;
    padding-bottom: 0;
}

.response-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    opacity: 0.7;
}

.response-meta {
    margin-top: 0.5rem;
    font-size: 0.8em;
    color: var(--text-muted);
}

.response-timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.response-content {
    color: var(--text-primary);
    word-wrap: break-word;
    line-height: 1.5;
    font-size: 0.9em;
}

/* Markdown Styling */
.response-content h1,
.response-content h2,
.response-content h3,
.response-content h4,
.response-content h5,
.response-content h6 {
    color: var(--text-primary);
    margin: 1em 0 0.4em 0;
    font-weight: 600;
    line-height: 1.2;
}

.response-content h1 {
    font-size: 1.3em;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.3em;
}

.response-content h2 {
    font-size: 1.2em;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.2em;
}

.response-content h3 {
    font-size: 1.1em;
}

.response-content h4 {
    font-size: 1.05em;
}

.response-content p {
    margin: 0.6em 0;
}

.response-content ul,
.response-content ol {
    margin: 0.6em 0;
    padding-left: 1.5em;
}

.response-content li {
    margin: 0.2em 0;
}

.response-content blockquote {
    border-left: 3px solid var(--accent-color);
    margin: 0.7em 0;
    padding: 0.1em 0.8em;
    background-color: var(--bg-tertiary);
    border-radius: 0 4px 4px 0;
    color: var(--text-secondary);
    font-style: italic;
    font-size: 0.95em;
}

.response-content code {
    background-color: var(--bg-tertiary);
    color: var(--accent-color);
    padding: 0.15em 0.3em;
    border-radius: 3px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.85em;
}

.response-content pre {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow-x: auto;
    margin: 0.8em 0;
    padding: 0.8em;
}

.response-content pre code {
    background: none;
    color: inherit;
    padding: 0;
    font-size: 0.8em;
    line-height: 1.3;
}

.response-content table {
    border-collapse: collapse;
    width: 100%;
    margin: 0.8em 0;
    border-radius: 4px;
    overflow: hidden;
    font-size: 0.9em;
}

.response-content th,
.response-content td {
    border: 1px solid var(--border-color);
    padding: 0.4em 0.5em;
    text-align: left;
}

.response-content th {
    background-color: var(--bg-tertiary);
    font-weight: 600;
}

.response-content tr:nth-child(even) {
    background-color: var(--bg-secondary);
}

.response-content a {
    color: var(--accent-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
}

.response-content a:hover {
    border-bottom-color: var(--accent-color);
}

.response-content strong {
    font-weight: 600;
    color: var(--text-primary);
}

.response-content em {
    font-style: italic;
    color: var(--text-secondary);
}

.response-content hr {
    border: none;
    height: 1px;
    background: var(--border-color);
    margin: 1.5em 0;
    border-radius: 1px;
}

/* Code block improvements */
.response-content pre {
    position: relative;
}

.response-content pre:hover {
    box-shadow: 0 2px 8px var(--shadow);
}

/* Ensure proper spacing between elements */
.response-content > *:first-child {
    margin-top: 0;
}

.response-content > *:last-child {
    margin-bottom: 0;
}

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

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--accent-color);
    animation: spin 1s ease-in-out infinite;
}

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

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

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

.modal {
    background-color: var(--bg-primary);
    border-radius: 16px;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from { opacity: 0; transform: scale(0.9) translateY(-20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0.5rem;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-content {
    padding: 1.5rem;
}

/* Panels toolbar */
.panels-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.add-panel-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 10px;
    padding: 0.5rem 0.75rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.add-panel-btn:hover:not(:disabled) {
    background-color: var(--bg-tertiary);
}

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

.panels-hint {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.remove-panel-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 32px;
    height: 32px;
    border-radius: 8px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.remove-panel-btn:hover {
    background-color: var(--bg-secondary);
    color: var(--error-color);
}

.input-help {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 0.35rem;
}

.api-key-section {
    margin-bottom: 1.5rem;
}

.api-key-section label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.input-with-icon {
    position: relative;
}

.input-with-icon input {
    width: 100%;
    padding: 0.75rem;
    padding-right: 3rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.2s ease;
}

.input-with-icon input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Plain input with the same styling as input-with-icon, without extra right padding */
.input-plain input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.2s ease;
}

.input-plain input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.toggle-password {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    transition: color 0.2s ease;
}

.toggle-password:hover {
    color: var(--text-primary);
}

.modal-actions {
    margin: 2rem 0 1rem;
}

.save-btn {
    width: 100%;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.settings-info {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 1rem;
    background-color: var(--bg-tertiary);
    border-radius: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.settings-info i {
    margin-top: 0.125rem;
    flex-shrink: 0;
}

/* Toggle Switch */
.toggle-section {
    margin-top: 1rem;
    padding: 1rem;
    background-color: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.toggle-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    margin-bottom: 0.75rem;
}

.toggle-text {
    font-weight: 500;
    color: var(--text-primary);
}

.toggle-switch {
    position: relative;
    width: 50px;
    height: 24px;
}

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

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    border-radius: 24px;
    transition: all 0.3s ease;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

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

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(26px);
}

.toggle-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

/* Copy Format Toggle */
.copy-format-toggle {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.copy-format-toggle input[type="radio"] {
    display: none;
}

.radio-label {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    background-color: var(--bg-secondary);
}

.radio-label:hover {
    border-color: var(--accent-color);
    color: var(--text-primary);
}

.copy-format-toggle input[type="radio"]:checked + .radio-label {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.copy-format-toggle input[type="radio"]:checked + .radio-label:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        padding: 1rem;
    }
    
    .header-content {
        padding: 0 1rem;
    }
    
    .prompt-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .button-stack {
        align-self: stretch;
    }
    
    .ai-responses {
        grid-template-columns: 1fr;
    }
    
    .modal {
        margin: 1rem;
    }
    
    .ai-controls {
        flex-direction: column;
        align-items: flex-end;
        gap: 0.5rem;
    }
    
    .model-selector {
        min-width: 100px;
        font-size: 0.75rem;
    }
    .provider-selector {
        min-width: 100px;
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .app-title {
        font-size: 1.25rem;
    }
    
    .send-btn, .clear-btn {
        padding: 0.875rem 1.25rem;
        font-size: 0.9rem;
    }
}

/* Floating Copy Button */
.ai-response {
    position: relative;
}

.copy-btn {
    position: absolute;
    bottom: -35px;
    left: 12px;
    background: var(--bg-primary);
    border: none;
    color: var(--text-muted);
    padding: 6px 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: 14px;
    display: none;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    box-shadow: 0 2px 8px var(--shadow);
    z-index: 10;
}

.copy-btn:hover {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow);
}

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

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

.copy-btn.copied:hover {
    background-color: var(--success-color);
    color: white;
    transform: translateY(-1px);
}

/* Confirmation Dialog */
.confirmation-dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    animation: fadeIn 0.2s ease;
}

.confirmation-dialog {
    background-color: var(--bg-primary);
    border-radius: 16px;
    max-width: 500px;
    width: 100%;
    padding: 2rem;
    box-shadow: 0 25px 50px var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
}

.confirmation-dialog h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.confirmation-dialog p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.confirmation-dialog-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.confirmation-btn {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-size: 1rem;
}

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

.confirmation-btn.save-btn:hover {
    background-color: #059669;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

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

.confirmation-btn.discard-btn:hover {
    background-color: #dc2626;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.confirmation-btn.cancel-btn {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.confirmation-btn.cancel-btn:hover {
    background-color: var(--bg-secondary);
    transform: translateY(-1px);
}