/* ===================================================================
   Symptom Checker Mini -- Main Stylesheet
   =================================================================== */

/* ---- CSS Variables ---- */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --success: #16a34a;
    --success-light: #dcfce7;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #dc2626;
    --danger-light: #fee2e2;
    --info: #0891b2;
    --info-light: #cffafe;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --radius: 8px;
    --radius-lg: 12px;
    --transition: 0.2s ease;
}

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

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ---- Disclaimer Banner ---- */
.disclaimer-banner {
    background: var(--danger);
    color: var(--white);
    padding: 10px 20px;
    font-size: 0.875rem;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.disclaimer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 12px;
}

.disclaimer-content i:first-child {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.dismiss-btn {
    background: rgba(255,255,255,0.2);
    border: none;
    color: var(--white);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    margin-left: auto;
    flex-shrink: 0;
    transition: background var(--transition);
}

.dismiss-btn:hover { background: rgba(255,255,255,0.3); }

.disclaimer-banner.hidden { display: none; }

/* ---- Navbar ---- */
.navbar {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 0 24px;
    display: flex;
    align-items: center;
    height: 60px;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 900;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-brand i { font-size: 1.5rem; }

.nav-links {
    list-style: none;
    display: flex;
    gap: 4px;
    margin-left: auto;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-600);
    padding: 8px 16px;
    border-radius: var(--radius);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-link:hover { background: var(--gray-100); color: var(--primary); }
.nav-link.active { background: var(--primary-light); color: var(--primary-dark); }

/* ---- Main Container ---- */
.main-container {
    max-width: 1200px;
    margin: 24px auto;
    padding: 0 24px;
    flex: 1;
    width: 100%;
}

/* ---- Cards ---- */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 20px;
    border: 1px solid var(--gray-200);
    transition: box-shadow var(--transition);
}

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

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--gray-100);
}

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
}

.card-header i {
    font-size: 1.25rem;
    color: var(--primary);
}

/* ---- Form Elements ---- */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--gray-700);
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.95rem;
    transition: border-color var(--transition), box-shadow var(--transition);
    background: var(--white);
    color: var(--gray-800);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

select.form-control { cursor: pointer; }

textarea.form-control { resize: vertical; min-height: 80px; }

/* ---- Severity Slider ---- */
.severity-slider {
    display: flex;
    align-items: center;
    gap: 12px;
}

.severity-slider input[type="range"] {
    flex: 1;
    accent-color: var(--primary);
    height: 6px;
}

.severity-value {
    font-weight: 700;
    font-size: 1.1rem;
    min-width: 32px;
    text-align: center;
    padding: 4px 8px;
    background: var(--gray-100);
    border-radius: var(--radius);
}

.severity-low { color: var(--success); }
.severity-mid { color: var(--warning); }
.severity-high { color: var(--danger); }

/* ---- Symptom Checklist ---- */
.symptom-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 8px;
    margin-top: 8px;
}

.symptom-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 0.875rem;
}

.symptom-checkbox:hover { background: var(--primary-light); border-color: var(--primary); }

.symptom-checkbox.selected {
    background: var(--primary-light);
    border-color: var(--primary);
    font-weight: 600;
}

.symptom-checkbox input[type="checkbox"] {
    accent-color: var(--primary);
    width: 16px;
    height: 16px;
}

/* ---- Region Tabs ---- */
.region-tabs {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.region-tab {
    padding: 6px 14px;
    border: 1px solid var(--gray-300);
    border-radius: 20px;
    background: var(--white);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition);
    color: var(--gray-600);
}

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

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

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { background: var(--gray-400); cursor: not-allowed; }

.btn-success { background: var(--success); color: var(--white); }
.btn-success:hover { background: #15803d; }

.btn-danger { background: var(--danger); color: var(--white); }
.btn-danger:hover { background: #b91c1c; }

.btn-outline {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
}
.btn-outline:hover { background: var(--gray-100); }

.btn-lg { padding: 14px 28px; font-size: 1.05rem; }

.btn-block { width: 100%; justify-content: center; }

/* ---- Condition Result Cards ---- */
.condition-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
}

.condition-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.condition-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.condition-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-800);
}

.condition-category {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--gray-500);
    margin-top: 2px;
}

/* ---- Care Level Badges ---- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-self-care { background: var(--success-light); color: var(--success); }
.badge-opd { background: var(--info-light); color: var(--info); }
.badge-urgent { background: var(--warning-light); color: #b45309; }
.badge-emergency { background: var(--danger-light); color: var(--danger); }

/* ---- Confidence Bar ---- */
.confidence-bar-container {
    margin: 10px 0;
}

.confidence-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    margin-bottom: 4px;
    color: var(--gray-600);
}

.confidence-bar {
    height: 8px;
    background: var(--gray-200);
    border-radius: 4px;
    overflow: hidden;
}

.confidence-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.6s ease;
}

.confidence-low { background: var(--success); }
.confidence-mid { background: var(--warning); }
.confidence-high { background: var(--danger); }

/* ---- Red Flag Alert ---- */
.red-flag-alert {
    background: var(--danger-light);
    border: 2px solid var(--danger);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 20px;
    animation: pulse-border 2s infinite;
}

@keyframes pulse-border {
    0%, 100% { border-color: var(--danger); }
    50% { border-color: #ef4444; box-shadow: 0 0 12px rgba(220, 38, 38, 0.3); }
}

.red-flag-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--danger);
}

.red-flag-action {
    background: var(--danger);
    color: var(--white);
    padding: 10px 16px;
    border-radius: var(--radius);
    font-weight: 600;
    margin-top: 10px;
    display: inline-block;
}

/* ---- Care Level Summary ---- */
.care-level-summary {
    padding: 20px;
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.care-level-summary i { font-size: 2rem; }

.care-level-summary h3 { font-size: 1.25rem; margin-bottom: 4px; }

/* ---- Session History ---- */
.history-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.history-table th,
.history-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.history-table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.history-table tr:hover td { background: var(--gray-50); }

/* ---- Loading Spinner ---- */
.spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

.loading-overlay {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 40px;
    color: var(--gray-500);
}

/* ---- Empty State ---- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

.empty-state i { font-size: 3rem; margin-bottom: 16px; color: var(--gray-300); }
.empty-state h3 { color: var(--gray-700); margin-bottom: 8px; }

/* ---- Body Diagram ---- */
.body-diagram-container {
    text-align: center;
    margin: 16px 0;
}

.body-diagram {
    max-width: 280px;
    margin: 0 auto;
    position: relative;
}

.body-region-btn {
    position: absolute;
    background: rgba(37, 99, 235, 0.1);
    border: 2px solid transparent;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6rem;
}

.body-region-btn:hover {
    background: rgba(37, 99, 235, 0.3);
    border-color: var(--primary);
    transform: scale(1.2);
}

.body-region-btn.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary-dark);
}

/* ---- Matched Symptom Tags ---- */
.symptom-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}

.symptom-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    background: var(--primary-light);
    color: var(--primary-dark);
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.symptom-tag.partial {
    background: var(--warning-light);
    color: #92400e;
}

/* ---- Toast / Notification ---- */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 14px 20px;
    border-radius: var(--radius);
    color: var(--white);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    animation: slideIn 0.3s ease;
    max-width: 380px;
}

.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-warning { background: var(--warning); color: var(--gray-800); }

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

/* ---- Footer ---- */
.app-footer {
    background: var(--gray-800);
    color: var(--gray-400);
    text-align: center;
    padding: 20px 24px;
    font-size: 0.8rem;
    margin-top: auto;
}

.footer-disclaimer {
    background: rgba(220, 38, 38, 0.15);
    color: #fca5a5;
    padding: 8px 16px;
    border-radius: var(--radius);
    margin-bottom: 12px;
    display: inline-block;
    font-size: 0.75rem;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .navbar { padding: 0 12px; }
    .nav-links { gap: 0; }
    .nav-link { padding: 6px 10px; font-size: 0.8rem; }
    .nav-link span { display: none; }
    .main-container { padding: 0 12px; margin: 12px auto; }
    .symptom-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
    .condition-header { flex-direction: column; gap: 8px; }
    .care-level-summary { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
    .region-tabs { gap: 2px; }
    .region-tab { padding: 4px 10px; font-size: 0.7rem; }
    .card { padding: 16px; }
    .btn-lg { padding: 12px 20px; font-size: 0.95rem; }
}

/* ---- Utility ---- */
.text-center { text-align: center; }
.text-muted { color: var(--gray-500); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.hidden { display: none !important; }