/* =============================================================================
   Progressive Disclosure UI Components
   Controls Panel, Stats Bar, Modal, Zoom Controls for Atlas
   ============================================================================= */

/* ==========================================================================
   Hamburger Toggle Button
   ========================================================================== */

.controls-toggle {
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--glass-border-subtle);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: background var(--transition-fast);
    flex-shrink: 0;
}

.controls-toggle:hover {
    background: rgba(255, 255, 255, 0.05);
}

.controls-toggle:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 20px;
    height: 20px;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
    transform-origin: center;
}

/* Hamburger → X animation when panel open */
.controls-toggle[aria-expanded="true"] .hamburger span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.controls-toggle[aria-expanded="true"] .hamburger span:nth-child(2) {
    opacity: 0;
}

.controls-toggle[aria-expanded="true"] .hamburger span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

[data-theme="light"] .controls-toggle {
    border-color: rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .controls-toggle:hover {
    background: rgba(0, 0, 0, 0.05);
}

/* ==========================================================================
   Controls Panel (Side Panel)
   ========================================================================== */

.controls-panel {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 320px;
    max-width: 90vw;
    z-index: var(--z-drawer, 100);
    background: var(--glass-bg-dark);
    backdrop-filter: blur(var(--glass-blur-strong));
    -webkit-backdrop-filter: blur(var(--glass-blur-strong));
    border-right: 1px solid var(--glass-border-medium);
    box-shadow: var(--shadow-2xl);
    transform: translateX(-100%);
    transition: transform var(--transition-medium) var(--ease-out-expo);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.controls-panel.open {
    transform: translateX(0);
}

[data-theme="light"] .controls-panel {
    background: rgba(255, 255, 255, 0.95);
    border-right-color: rgba(0, 0, 0, 0.12);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

/* Panel Content (scrollable) */
.panel-content {
    flex: 1;
    overflow-y: auto;
    padding: calc(56px + var(--spacing-4)) var(--spacing-4) var(--spacing-4);
    scrollbar-width: thin;
    scrollbar-color: var(--glass-border-medium) transparent;
}

.panel-content::-webkit-scrollbar {
    width: 6px;
}

.panel-content::-webkit-scrollbar-track {
    background: transparent;
}

.panel-content::-webkit-scrollbar-thumb {
    background: var(--glass-border-medium);
    border-radius: 3px;
}

/* ==========================================================================
   Panel Sections
   ========================================================================== */

.panel-section {
    margin-bottom: var(--spacing-4);
    padding-bottom: var(--spacing-4);
    border-bottom: 1px solid var(--glass-border-subtle);
}

.panel-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.panel-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0 0 var(--spacing-3);
}

/* ==========================================================================
   Collapsible Sections (Filters, Export)
   ========================================================================== */

.panel-section.collapsible {
    padding-bottom: 0;
}

.panel-section-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--spacing-3) 0;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.panel-section-toggle:hover {
    color: var(--accent);
}

.panel-section-toggle:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.panel-section-toggle .panel-section-title {
    margin: 0;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.panel-section-subtitle {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin: 0 0 var(--spacing-2);
}

/* Layer Info Panel */
.layer-info-body {
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

.layer-info-body h3.layer-info-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem;
}

.layer-info-body h4 {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin: 0.75rem 0 0.25rem;
}

.layer-info-body p {
    margin: 0 0 0.5rem;
}

.layer-info-body ul {
    margin: 0 0 0.5rem;
    padding-left: 1.2rem;
}

.layer-info-body li {
    margin-bottom: 0.2rem;
}

.layer-info-body a {
    color: var(--accent);
    text-decoration: none;
}

.layer-info-body a:hover {
    text-decoration: underline;
}

.layer-info-body .info-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.75rem;
    margin: 0.5rem 0;
}

.layer-info-body .info-table th,
.layer-info-body .info-table td {
    text-align: left;
    padding: 0.25rem 0.4rem;
    border-bottom: 1px solid var(--border);
}

.layer-info-body .info-table th {
    font-weight: 600;
    color: var(--text-primary);
}

.toggle-chevron {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    transition: transform var(--transition-fast) var(--ease-out-quart);
    flex-shrink: 0;
}

.panel-section-toggle[aria-expanded="true"] .toggle-chevron {
    transform: rotate(180deg);
}

.panel-section-content {
    padding-bottom: var(--spacing-4);
}

.panel-section-content[hidden] {
    display: none;
}

/* Filter group within collapsible */
.filter-group {
    margin-bottom: var(--spacing-3);
}

.filter-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-1);
}

/* ==========================================================================
   Panel Overlay (Mobile backdrop)
   ========================================================================== */

.panel-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    z-index: var(--z-drawer-overlay, 90);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-medium), visibility var(--transition-medium);
}

.panel-overlay.visible {
    opacity: 1;
    visibility: visible;
}

[data-theme="light"] .panel-overlay {
    background: rgba(0, 0, 0, 0.3);
}

/* ==========================================================================
   Stats Bar (Desktop)
   ========================================================================== */

.stats-bar {
    position: fixed;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-stats-bar, 30);
    background: rgba(10, 10, 15, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 20px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    transition: all var(--transition-medium) var(--ease-out-expo);
    max-width: 360px;
}

.stats-bar.expanded {
    border-radius: 16px;
    max-width: 400px;
}

.stats-bar-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    min-height: 36px;
    width: 100%;
    transition: background var(--transition-fast);
}

.stats-bar-toggle:hover {
    background: rgba(255, 255, 255, 0.05);
}

.stats-bar-toggle:focus-visible {
    outline: none;
    background: rgba(74, 158, 255, 0.08);
}

.stats-bar-compact {
    display: flex;
    gap: 8px;
    align-items: center;
    font-size: 0.8rem;
}

.stat-pill {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.stat-pill span {
    color: var(--text-primary);
    font-weight: 600;
}

.stat-pill-accent span {
    color: var(--accent);
}

.stats-chevron {
    width: 14px;
    height: 14px;
    color: var(--text-muted);
    transition: transform var(--transition-fast) var(--ease-out-quart);
    margin-left: auto;
    flex-shrink: 0;
}

.stats-bar.expanded .stats-chevron {
    transform: rotate(180deg);
}

.stats-bar-expanded {
    display: none;
    padding: 8px 16px 12px;
    border-top: 1px solid var(--glass-border-subtle);
}

.stats-bar.expanded .stats-bar-expanded {
    display: block;
}

.stats-bar .stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    padding: 4px 0;
}

.stat-item .stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.stat-item .stat-value {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--accent);
}

.extremes-mini {
    display: flex;
    gap: 12px;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--glass-border-subtle);
}

.extreme-item {
    display: flex;
    gap: 4px;
    font-size: 0.75rem;
}

.extreme-label {
    color: var(--text-muted);
}

.extreme-value {
    color: var(--text-primary);
    font-weight: 600;
}

/* Light theme stats bar */
[data-theme="light"] .stats-bar {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(0, 0, 0, 0.12);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

/* Hide stats bar on mobile */
@media (max-width: 768px) {
    .stats-bar {
        display: none;
    }
}

/* ==========================================================================
   Modal (Fullscreen Dialog)
   ========================================================================== */

.modal {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    margin: 0;
    padding: 0;
    border: none;
    background: var(--bg-primary);
    z-index: var(--z-modal, 200);
    display: none;
    flex-direction: column;
}

.modal[open] {
    display: flex;
}

.modal::backdrop {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-6);
    border-bottom: 1px solid var(--glass-border-subtle);
    background: var(--glass-bg-dark);
    flex-shrink: 0;
}

.modal-header-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.modal-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border-subtle);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.modal-close svg {
    width: 18px;
    height: 18px;
}

.modal-close:hover {
    background: var(--bg-card-hover);
    border-color: var(--glass-border-medium);
}

.modal-close:focus-visible {
    outline: none;
    box-shadow: var(--glow-focus);
}

.modal-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-6);
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-3) var(--spacing-6);
    border-top: 1px solid var(--glass-border-subtle);
    background: var(--glass-bg-dark);
    flex-shrink: 0;
}

/* ==========================================================================
   Minimal Header
   ========================================================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header, 60);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--glass-bg-dark);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border-subtle);
    height: 56px;
}

[data-theme="light"] .site-header {
    background: rgba(255, 255, 255, 0.9);
    border-bottom-color: rgba(0, 0, 0, 0.1);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.header-title {
    font-size: 1.3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    line-height: 1.2;
}

.header-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

/* ==========================================================================
   Map Hero Layout
   ========================================================================== */

.map-hero {
    position: fixed;
    inset: 0;
    z-index: var(--z-map, 1);
    padding-top: 56px; /* Header height */
}

.map-viewport {
    width: 100%;
    height: 100%;
    position: relative;
}

.map-viewport svg {
    width: 100%;
    height: 100%;
}

/* ==========================================================================
   Legend Overlay
   ========================================================================== */

.legend-overlay {
    position: fixed;
    bottom: 60px;
    right: var(--spacing-4);
    z-index: var(--z-legend, 10);
    background: var(--glass-bg-dark);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border-medium);
    border-radius: var(--radius-md);
    padding: var(--spacing-2) var(--spacing-3);
    box-shadow: var(--panel-shadow);
}

.legend-gradient {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.legend-bar {
    width: 120px;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(to right, var(--gradient-start), var(--gradient-mid), var(--gradient-end));
}

.legend-label-low,
.legend-label-high {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 500;
}

.legend-metric {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-align: center;
    margin-top: var(--spacing-1);
}

[data-theme="light"] .legend-overlay {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(0, 0, 0, 0.12);
}

/* ==========================================================================
   Zoom Controls
   ========================================================================== */

.zoom-controls {
    position: fixed;
    bottom: 60px;
    left: var(--spacing-4);
    z-index: var(--z-controls, 20);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1);
}

.zoom-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--glass-bg-dark);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border-medium);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    padding: 0;
}

.zoom-btn svg {
    width: 16px;
    height: 16px;
}

.zoom-btn:hover {
    background: var(--glass-bg-medium);
    border-color: var(--glass-border-accent);
}

.zoom-btn:focus-visible {
    outline: none;
    box-shadow: var(--glow-focus);
}

[data-theme="light"] .zoom-btn {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(0, 0, 0, 0.12);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
    display: none; /* Hidden by default in map-hero mode */
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   Mobile Responsive
   ========================================================================== */

@media (max-width: 768px) {
    .site-header {
        height: 52px;
        padding: var(--spacing-2) var(--spacing-3);
    }

    .map-hero {
        padding-top: 52px;
    }

    .header-title {
        font-size: 1.1rem;
    }

    .legend-overlay {
        bottom: 16px;
        right: var(--spacing-3);
    }

    .zoom-controls {
        bottom: 16px;
        left: var(--spacing-3);
    }

    .zoom-btn {
        width: 32px;
        height: 32px;
    }

    .zoom-btn svg {
        width: 14px;
        height: 14px;
    }
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .controls-panel,
    .panel-overlay,
    .stats-bar,
    .stats-chevron,
    .hamburger span,
    .toggle-chevron,
    .site-header {
        transition: none;
    }
}