:root {
    /* Color Palette - Monochrome & Premium */
    --background: #FAFAFA;
    --surface: #FFFFFF;
    --text-primary: #111827;
    --text-secondary: #525252;
    --primary-black: #000000;
    --border: #E5E5E5;
    --border-hover: #A3A3A3;
    --badge: #F3F4F6;

    /* Spacing - 8px base unit */
    --gap-sm: 8px;
    --gap-md: 16px;
    --gap-lg: 24px;
    --gap-xl: 40px;
    --section-padding: 140px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 999px;

    /* Shadows */
    --shadow-subtle: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 17px;
    min-height: 100vh;
    padding-top: 80px;
    /* Space for the fixed header */
}

/* Universal Header */
.universal-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.header-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--gap-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.header-logo:hover {
    transform: translateY(-1px);
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.logo-text span {
    font-weight: 400;
    color: var(--text-secondary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--gap-lg);
}

.header-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    background: var(--badge);
    padding: 6px 14px;
    border-radius: var(--radius-full);
}

.status-dot {
    width: 6px;
    height: 6px;
    background: #10B981;
    border-radius: 50%;
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.header-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-family: inherit;
}

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

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

.header-btn:hover {
    transform: translateY(-1px);
    border-color: var(--primary-black);
    box-shadow: var(--shadow-subtle);
}

.header-btn svg {
    opacity: 0.7;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--gap-xl) var(--gap-md);
}

/* Header */
.header {
    text-align: center;
    padding: var(--section-padding) 0 60px;
    animation: fadeIn 0.8s ease-out;
}

.header h1 {
    font-size: 3.75rem;
    /* 60px per DS */
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.04em;
    color: var(--text-primary);
    margin-bottom: var(--gap-md);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto var(--gap-xl);
}

.status-bar {
    display: inline-flex;
    align-items: center;
    background: var(--badge);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Query Section */
.query-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    /* 2.5rem per Bento Card DS */
    margin-bottom: var(--section-padding);
    box-shadow: var(--shadow-subtle);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.query-section:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.input-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--gap-md);
    margin-bottom: var(--gap-lg);
}

#queryInput {
    width: 100%;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--gap-md);
    color: var(--text-primary);
    font-size: 17px;
    font-family: inherit;
    line-height: 1.5;
    resize: none;
    transition: border-color 0.2s ease;
}

#queryInput:focus {
    outline: none;
    border-color: var(--primary-black);
}

#queryInput::placeholder {
    color: #A3A3A3;
}

.submit-btn {
    background: var(--primary-black);
    border: 1px solid var(--primary-black);
    border-radius: var(--radius-md);
    padding: 14px 28px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.submit-btn:hover {
    background: #262626;
    border-color: #262626;
}

.submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.section-label {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: var(--gap-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

/* Results Section */
.results-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-subtle);
    animation: fadeIn 0.5s ease-out;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--gap-xl);
    padding-bottom: var(--gap-md);
    border-bottom: 1px solid var(--border);
}

.results-header h2 {
    font-size: 2.25rem;
    /* 36px per DS */
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1.2;
    color: var(--text-primary);
}

.results-actions {
    display: flex;
    gap: var(--gap-sm);
}

.action-btn {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 8px 16px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

/* Results Content Typography */
.results-content {
    color: var(--text-secondary);
}

.results-content h1 {
    font-size: 2.25rem;
    font-weight: 600;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin: 40px 0 20px;
}

.results-content h2 {
    font-size: 1.25rem;
    /* 20px per DS H3 */
    font-weight: 600;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin: 32px 0 16px;
}

.results-content p {
    margin-bottom: 16px;
}

.results-content code {
    background: var(--badge);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    color: var(--text-primary);
}

.results-content pre {
    background: #111827;
    color: #F9FAFB;
    padding: var(--gap-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: var(--gap-md) 0;
}

.results-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 40px 0;
}

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

/* Footer */
.footer {
    text-align: center;
    padding: 80px 0;
    color: #A3A3A3;
    font-size: 13px;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* History Section */
.history-section {
    margin-bottom: var(--section-padding);
}

.history-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--gap-md);
    margin-top: var(--gap-md);
}

.report-card {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--gap-md);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: var(--gap-sm);
    animation: fadeIn 0.4s ease-out;
}

.delete-report-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #FEE2E2;
    color: #EF4444;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s ease;
    z-index: 2;
}

.report-card:hover .delete-report-btn {
    opacity: 1;
}

.delete-report-btn:hover {
    background: #EF4444;
    color: white;
    transform: scale(1.1);
}

.report-card:hover {
    border-color: var(--primary-black);
    transform: translateY(-2px);
    box-shadow: var(--shadow-subtle);
}

.report-card .date {
    font-size: 11px;
    color: #A3A3A3;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.report-card .query-text {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 4px 0;
}

.report-card .stats {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: auto;
    display: flex;
    justify-content: space-between;
}

.report-card .size {
    opacity: 0.7;
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        padding: 80px 0 40px;
    }

    .header h1 {
        font-size: 2.5rem;
    }

    .results-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--gap-md);
    }
}

@media print {

    .header,
    .query-section,
    .footer,
    .results-actions {
        display: none !important;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    .results-section {
        border: none;
        box-shadow: none;
        padding: 0;
    }

    body {
        background: white;
        color: black;
    }
}

/* PDF/Print Export Styles */
.pdf-export-container {
    background: white !important;
    color: #111827 !important;
    padding: 40px !important;
    font-family: 'Inter', sans-serif !important;
    line-height: 1.7 !important;
}

.pdf-export-container h1 {
    color: #000000 !important;
    font-size: 24pt !important;
    margin-bottom: 20pt !important;
    border-bottom: 2px solid #E5E5E5 !important;
    padding-bottom: 10pt !important;
    letter-spacing: -0.04em !important;
}

.pdf-export-container h2 {
    color: #111827 !important;
    font-size: 18pt !important;
    margin-top: 20pt !important;
    margin-bottom: 12pt !important;
    letter-spacing: -0.03em !important;
}

.pdf-export-container h3 {
    color: #111827 !important;
    font-size: 14pt !important;
    margin-top: 15pt !important;
    letter-spacing: -0.03em !important;
}

.pdf-export-container p,
.pdf-export-container li {
    color: #525252 !important;
    font-size: 11pt !important;
    margin-bottom: 8pt !important;
}

.pdf-export-container code {
    background: #F3F4F6 !important;
    border: 1px solid #E5E5E5 !important;
    color: #111827 !important;
}

.pdf-export-container pre {
    background: #111827 !important;
    border-radius: 8px !important;
    color: #F9FAFB !important;
    padding: 15pt !important;
}

.pdf-export-container .mock-badge {
    background: #FEF3C7 !important;
    color: #92400E !important;
    border: 1px solid #FDE68A !important;
    padding: 10px !important;
    border-radius: 8px !important;
    margin-bottom: 20px !important;
    font-weight: bold !important;
}

.pdf-export-container a {
    color: #000000 !important;
    text-decoration: underline !important;
}

.pdf-export-container {
    page-break-inside: auto;
}

.pdf-export-container h1,
.pdf-export-container h2,
.pdf-export-container h3 {
    page-break-after: avoid;
}