/* HealthReportAnalyzer -- Main Stylesheet */

/* ===== CSS Variables / Theme ===== */
:root {
    --color-bg: #f4f7fa;
    --color-surface: #ffffff;
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-secondary: #6366f1;
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-border: #e2e8f0;
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    --color-critical: #8B0000;
    --color-info: #17a2b8;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.2s ease;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

a:hover {
    color: var(--color-primary-dark);
}

/* ===== Navbar ===== */
.navbar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0 2rem;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-logo {
    font-size: 1.5rem;
}

.nav-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
}

/* ===== Cards ===== */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

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

.card-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text);
}

/* ===== Dashboard Grid ===== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

.stat-label {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== Upload Area ===== */
.upload-area {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 1.5rem;
    background: var(--color-surface);
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--color-text-secondary);
}

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

.textarea-input {
    width: 100%;
    min-height: 200px;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: "Courier New", monospace;
    font-size: 0.875rem;
    resize: vertical;
    transition: var(--transition);
    line-height: 1.5;
}

.textarea-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    border: none;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

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

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

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

.btn-danger:hover {
    background: #c82333;
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
}

.btn-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* ===== Biomarker Table ===== */
.biomarker-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.biomarker-table th {
    background: var(--color-bg);
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--color-border);
}

.biomarker-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

.biomarker-table tr:hover {
    background: var(--color-bg);
}

/* ===== Status Badges ===== */
.status-badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.status-normal {
    background: #d4edda;
    color: #155724;
}

.status-borderline_low,
.status-borderline_high {
    background: #fff3cd;
    color: #856404;
}

.status-low,
.status-high {
    background: #f8d7da;
    color: #721c24;
}

.status-critical_low,
.status-critical_high {
    background: #721c24;
    color: #ffffff;
}

/* ===== Assessment Badges ===== */
.assessment-badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
}

.assessment-normal {
    background: #d4edda;
    color: #155724;
}

.assessment-attention {
    background: #fff3cd;
    color: #856404;
}

.assessment-concern {
    background: #f8d7da;
    color: #721c24;
}

.assessment-critical {
    background: #721c24;
    color: #ffffff;
}

/* ===== Risk Flags ===== */
.risk-flag {
    padding: 1rem;
    border-radius: var(--radius);
    margin-bottom: 0.75rem;
    border-left: 4px solid;
}

.risk-flag-high {
    background: #f8d7da;
    border-color: var(--color-danger);
}

.risk-flag-moderate {
    background: #fff3cd;
    border-color: var(--color-warning);
}

.risk-flag-low {
    background: #d1ecf1;
    border-color: var(--color-info);
}

.risk-flag-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.risk-flag-description {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ===== Report Card ===== */
.report-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.report-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.report-card-info {
    flex: 1;
}

.report-card-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.report-card-meta {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

/* ===== Summary Box ===== */
.summary-box {
    background: var(--color-bg);
    border-radius: var(--radius);
    padding: 1.5rem;
    white-space: pre-wrap;
    font-size: 0.9rem;
    line-height: 1.8;
    border: 1px solid var(--color-border);
}

/* ===== Chart Container ===== */
.chart-container {
    position: relative;
    width: 100%;
    max-height: 400px;
    margin: 1rem 0;
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--color-text);
}

.form-input,
.form-select {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    transition: var(--transition);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 1.5rem;
    gap: 0;
}

.tab {
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition);
}

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

.tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* ===== Explanation Tooltip ===== */
.explanation-row {
    display: none;
    background: var(--color-bg);
}

.explanation-row.visible {
    display: table-row;
}

.explanation-cell {
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ===== Value Bar ===== */
.value-bar-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.value-bar {
    flex: 1;
    height: 8px;
    background: var(--color-border);
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}

.value-bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease;
}

.value-bar-marker {
    position: absolute;
    top: -3px;
    width: 3px;
    height: 14px;
    background: var(--color-text);
    border-radius: 2px;
    transform: translateX(-50%);
}

/* ===== Loading ===== */
.loading-spinner {
    text-align: center;
    padding: 3rem;
    color: var(--color-text-secondary);
    font-size: 1.1rem;
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--color-text-secondary);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state-text {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--color-text-secondary);
    font-size: 0.8rem;
    border-top: 1px solid var(--color-border);
    margin-top: auto;
}

/* ===== Toast / Notification ===== */
.toast-container {
    position: fixed;
    top: 80px;
    right: 1rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius);
    color: #fff;
    font-size: 0.9rem;
    box-shadow: var(--shadow-md);
    animation: slideIn 0.3s ease;
    max-width: 350px;
}

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

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

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

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .navbar {
        padding: 0 1rem;
        flex-wrap: wrap;
        height: auto;
        padding-top: 0.5rem;
        padding-bottom: 0.5rem;
    }

    .nav-links {
        width: 100%;
        justify-content: center;
    }

    .main-content {
        padding: 1rem;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .biomarker-table {
        font-size: 0.8rem;
    }

    .biomarker-table th,
    .biomarker-table td {
        padding: 0.5rem;
    }

    .report-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

/* ===== Checkbox Group (Compare) ===== */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 300px;
    overflow-y: auto;
    padding: 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem;
    cursor: pointer;
}

.checkbox-item:hover {
    background: var(--color-bg);
    border-radius: var(--radius);
}

/* ===== Category Pills ===== */
.category-pills {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.category-pill {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    transition: var(--transition);
}

.category-pill:hover,
.category-pill.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* ===== Progress Bar ===== */
.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--color-border);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s ease;
}