/* Design System Variables */
:root {
    /* Colors - Monotone Base */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    /* gray-50 */
    --text-primary: #111827;
    /* gray-900 */
    --text-secondary: #4b5563;
    /* gray-600 */
    --text-tertiary: #9ca3af;
    /* gray-400 */

    /* Accent Color */
    --accent: #1e3a8a;
    /* blue-900 */
    --accent-hover: #1e40af;
    /* blue-800 */
    --accent-light: #eff6ff;
    /* blue-50 */

    /* Borders & Shadows */
    --border-color: #e5e7eb;
    /* gray-200 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Spacing */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

/* Global Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent);
}

/* Layout */
.container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

header {
    margin-bottom: 3rem;
}

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

.subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* Components - Buttons */
button,
.btn-primary,
.btn-secondary,
.btn-danger,
.upload-btn,
.new-analysis-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    font-family: var(--font-sans);
}

/* Primary Button */
.btn-primary,
.upload-btn,
.add-section-btn,
.btn-add-prompt {
    background-color: var(--text-primary);
    /* Using black/dark gray for primary */
    color: white;
}

.btn-primary:hover,
.upload-btn:hover,
.add-section-btn:hover,
.btn-add-prompt:hover {
    background-color: black;
    transform: translateY(-1px);
}

/* Secondary Button */
.btn-secondary,
.nav-link,
.modal-close {
    background-color: white;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-secondary:hover,
.nav-link:hover,
.modal-close:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--text-tertiary);
}

/* Danger Button */
.btn-danger {
    background-color: white;
    border: 1px solid #fee2e2;
    color: #ef4444;
}

.btn-danger:hover {
    background-color: #fee2e2;
    border-color: #ef4444;
}

/* Ghost Button / Link styled as button */
.nav-link {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    background: white;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

/* Card Style */
.upload-area,
.progress-card,
.result-card,
.section-card,
.modal-content {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 2rem;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

/* Upload Section */
.upload-area {
    text-align: center;
    border-style: dashed;
    border-width: 2px;
    cursor: pointer;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--accent);
    background-color: var(--accent-light);
}

.upload-icon {
    color: var(--text-tertiary);
    margin-bottom: 1.5rem;
}

.upload-area h2 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.upload-area p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Progress Section */
.progress-card {
    max-width: 600px;
    margin: 0 auto;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

#progressCount {
    font-variant-numeric: tabular-nums;
    font-weight: 500;
    color: var(--text-primary);
}

.progress-bar {
    height: 6px;
    background-color: var(--bg-secondary);
    border-radius: 9999px;
    overflow: hidden;
}

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

/* Spinner */
.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--bg-secondary);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
}

.animate-spin {
    animation: spin 1s linear infinite;
}

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

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

.results-header h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

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

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

#resultsContainer {
    display: grid;
    gap: 1.5rem;
}

.result-card {
    padding: 0;
    overflow: hidden;
}

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

.result-title {
    font-weight: 600;
    font-size: 1rem;
}

.result-content {
    padding: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.status-badge.success {
    background-color: #ecfdf5;
    /* green-50 */
    color: #059669;
    /* green-700 */
}

.status-badge.error {
    background-color: #fef2f2;
    /* red-50 */
    color: #dc2626;
    /* red-600 */
}

.new-analysis-btn {
    margin-top: 2rem;
    width: 100%;
    background-color: white;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.new-analysis-btn:hover {
    background-color: var(--bg-secondary);
    border-color: var(--text-tertiary);
}

/* Management Page Styles */
.management-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.section-card {
    padding: 0;
}

.section-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-primary);
    /* Changed to white */
}

.section-info h2 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.section-description {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.prompts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
    padding: 1.5rem;
}

.prompt-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1rem;
    transition: all 0.2s;
}

.prompt-card:hover {
    background-color: white;
    border-color: var(--text-tertiary);
    box-shadow: var(--shadow-sm);
}

.prompt-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.prompt-title-row h3 {
    font-size: 0.95rem;
    font-weight: 500;
}

.prompt-content-preview {
    font-size: 0.85rem;
    color: var(--text-secondary);
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.75rem;
    margin-bottom: 1rem;
    line-height: 1.4;
    max-height: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.prompt-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.prompt-actions .btn-secondary,
.prompt-actions .btn-danger {
    flex: 1 1 auto;
    min-width: 0;
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    white-space: nowrap;
}

.btn-icon {
    padding: 0.25rem;
    color: var(--text-tertiary);
    background: none;
    border: none;
}

.btn-icon:hover {
    color: var(--text-primary);
}

/* Toggle Switch */
.toggle-switch {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
}

.toggle-switch input {
    display: none;
}

.toggle-slider {
    position: relative;
    width: 36px;
    height: 20px;
    background-color: #e5e7eb;
    border-radius: 9999px;
    transition: background-color 0.2s;
}

.toggle-slider:before {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background-color: white;
    border-radius: 50%;
    transition: transform 0.2s;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

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

.toggle-switch input:checked+.toggle-slider:before {
    transform: translateX(16px);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    z-index: 50;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--bg-primary);
    width: 90%;
    max-width: 500px;
    max-height: 85vh;
    padding: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-content.large {
    max-width: 800px;
}

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

.modal-header h2 {
    font-size: 1.125rem;
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.modal-actions {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    background-color: var(--bg-secondary);
}

.modal-body label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    margin-top: 1rem;
    color: var(--text-primary);
}

.modal-body textarea,
.modal-body input {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.875rem;
    transition: border-color 0.2s;
}

.modal-body textarea:focus,
.modal-body input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-light);
}

/* History Timeline Styles */
.history-timeline {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.history-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    transition: all 0.2s;
}

.history-item:hover {
    background-color: white;
    border-color: var(--text-tertiary);
    box-shadow: var(--shadow-md);
}

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

.history-date {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.history-header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.history-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.history-badge.llm {
    background-color: #eff6ff;
    color: #1e40af;
    border-color: #bfdbfe;
}

.history-badge.user {
    background-color: #f0fdf4;
    color: #15803d;
    border-color: #bbf7d0;
}

.history-content {
    margin-top: 1rem;
}

.history-content pre {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1rem;
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-x: auto;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
}

.btn-use-history {
    background-color: white;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-use-history:hover {
    background-color: var(--text-primary);
    color: white;
    border-color: var(--text-primary);
}

.no-history,
.error-message {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.875rem;
    padding: 2rem;
}

/* Utilities */
.hidden {
    display: none !important;
}