/* === Weather Hazard Assessment — Theme & Shared Styles === */

/* --- Theme Definitions --- */
[data-theme="dark"] {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --border: #4b5563;
    --success: #10b981;
    --error: #ef4444;
    --shadow: rgba(0, 0, 0, 0.3);
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f3f4f6;
    --bg-tertiary: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --border: #d1d5db;
    --success: #059669;
    --error: #dc2626;
    --shadow: rgba(0, 0, 0, 0.1);
}

/* --- Smooth theme transition --- */
*, *::before, *::after {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* --- Base element styles --- */
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    margin: 0;
    min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Navigation --- */
.nav-bar {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 50;
}
.nav-container {
    display: flex;
    align-items: center;
    max-width: 80rem;
    margin: 0 auto;
    gap: 1.5rem;
}
.nav-brand {
    font-weight: 700;
    font-size: 1.125rem;
    white-space: nowrap;
}
.nav-links {
    display: flex;
    gap: 0.5rem;
    flex: 1;
}
.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
}
.nav-link:hover, .nav-link.active {
    color: var(--accent);
    background-color: var(--bg-tertiary);
    text-decoration: none;
}
.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.375rem 0.75rem;
    cursor: pointer;
    font-size: 1.125rem;
    line-height: 1;
}
.theme-toggle-btn:hover {
    background-color: var(--bg-tertiary);
}

/* --- Layout --- */
.main-content {
    max-width: 80rem;
    margin: 0 auto;
    padding: 1.5rem;
}
.app-footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.75rem;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

/* --- Form inputs --- */
.form-input {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.5rem 0.75rem;
    width: 100%;
    font-size: 0.875rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
}
.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}
.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}
@media (max-width: 640px) {
    .form-grid { grid-template-columns: 1fr; }
}

/* --- Buttons --- */
.btn-primary {
    background-color: var(--accent);
    color: #fff;
    border: none;
    border-radius: 0.5rem;
    padding: 0.625rem 1.5rem;
    font-weight: 600;
    font-family: inherit;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background-color 0.2s;
}
.btn-primary:hover { background-color: var(--accent-hover); }
.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-family: inherit;
}
.btn-secondary:hover { background-color: var(--border); }

/* --- Tables --- */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
}
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}
.data-table thead {
    position: sticky;
    top: 0;
    z-index: 10;
}
.data-table th {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.625rem 0.75rem;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--border);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}
.data-table th[aria-sort]::after { content: ' ↕'; color: var(--text-muted); }
.data-table th[aria-sort="ascending"]::after { content: ' ↑'; color: var(--accent); }
.data-table th[aria-sort="descending"]::after { content: ' ↓'; color: var(--accent); }
.data-table td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}
.data-table tbody tr:nth-child(odd) { background-color: var(--bg-secondary); }
.data-table tbody tr:hover { background-color: var(--bg-tertiary); }
.data-table tbody tr.clickable { cursor: pointer; }

/* --- Climate table (from original index.html) --- */
.climate-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
    text-align: center;
}
.climate-table th, .climate-table td {
    border: 1px solid var(--border);
    padding: 4px 6px;
}
.climate-table th {
    background-color: var(--bg-tertiary);
    font-weight: 600;
}
.climate-table tr:nth-child(odd) td {
    background-color: var(--bg-secondary);
}

/* --- Collapsible sections --- */
.report-section {
    margin-bottom: 1rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    overflow: hidden;
}
.section-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--bg-secondary);
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    text-align: left;
}
.section-header:hover { background-color: var(--bg-tertiary); }
.section-header:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}
.section-header h2, .section-header h3 {
    margin: 0;
    font-size: inherit;
    font-weight: inherit;
}
.section-chevron {
    transition: transform 0.2s;
    font-size: 0.75rem;
    flex-shrink: 0;
}
.section-chevron.open { transform: rotate(90deg); }
.section-content { padding: 1rem; }
.section-content.collapsed { display: none; }

/* --- Skeleton loading --- */
.skeleton .skeleton-header {
    height: 2.5rem;
    background: var(--bg-tertiary);
    border-radius: 0.375rem;
    margin-bottom: 0.75rem;
    animation: pulse 1.5s ease-in-out infinite;
}
.skeleton .skeleton-body {
    height: 8rem;
    background: var(--bg-secondary);
    border-radius: 0.375rem;
    animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* --- Loading spinner --- */
.spinner {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 2rem;
    color: var(--text-secondary);
}

/* --- Pagination --- */
.pagination-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1rem 0;
}

/* --- Results toolbar --- */
.results-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 0;
    gap: 1rem;
    flex-wrap: wrap;
}
.toolbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
}
.toolbar-right {
    display: flex;
    gap: 0.5rem;
}
.filter-input {
    max-width: 250px;
}

/* --- Column dropdown --- */
.column-dropdown {
    position: absolute;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.75rem;
    max-height: 300px;
    overflow-y: auto;
    z-index: 20;
    box-shadow: 0 4px 12px var(--shadow);
}
.column-dropdown label {
    display: block;
    padding: 0.25rem 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
}
.column-dropdown label:hover { color: var(--text-primary); }

/* --- Error/alert --- */
.error-message {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
    padding: 1rem;
    border-radius: 0.5rem;
    margin: 1rem 0;
}

/* --- Card container --- */
.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: 0 1px 3px var(--shadow);
}

/* --- Utility --- */
.hidden { display: none !important; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.875rem; }
.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav-container { flex-wrap: wrap; gap: 0.5rem; }
    .nav-brand { font-size: 1rem; }
    .main-content { padding: 0.75rem; }
    .results-toolbar { flex-direction: column; align-items: stretch; }
    .filter-input { max-width: none; }
}