/* ==========================================================================
   CSS Variables
   ========================================================================== */
:root {
    /* Colors */
    --primary: #2c3e50;
    --secondary: #34495e;
    --accent: #3498db;
    --accent-hover: #2980b9;
    --danger: #e74c3c;
    --success: #27ae60;
    --warning: #ffc107;
    --text: #333;
    --text-muted: #7f8c8d;
    --text-light: #999;
    --bg-light: #f5f6fa;
    --border: #ddd;
    --white: #fff;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 10px;
    --space-lg: 15px;

    /* Border radius */
    --radius-sm: 3px;
    --radius: 4px;
    --radius-lg: 8px;
    --radius-pill: 10px;

    /* Shadows */
    --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 2px 10px rgba(0, 0, 0, 0.2);

    /* Fonts */
    --font-sans: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-mono: 'Courier New', monospace;
    --font-size-sm: 0.85rem;
    --font-size-base: 0.9rem;

    /* Transitions */
    --transition: 0.2s ease;
    --transition-slow: 0.3s ease;
}

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

body {
    font-family: var(--font-sans);
    height: 100vh;
    overflow: hidden;
    color: var(--text);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.hidden {
    display: none !important;
}

/* ==========================================================================
   Layout
   ========================================================================== */
#app-container {
    display: flex;
    height: 100%;
}

#map-container {
    flex: 1;
    position: relative;
    order: 2;
}

#map {
    height: 100%;
    width: 100%;
}

/* ==========================================================================
   Sidebars (shared)
   ========================================================================== */
#sidebar,
#elements-sidebar {
    background-color: var(--white);
    display: flex;
    flex-direction: column;
    z-index: 1000;
}

#sidebar {
    width: 350px;
    border-right: 1px solid var(--border);
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
}

#elements-sidebar {
    width: 300px;
    border-left: 1px solid var(--border);
    box-shadow: -2px 0 5px rgba(0, 0, 0, 0.1);
    order: 3;
}

.sidebar-header {
    padding: var(--space-lg);
    background-color: var(--primary);
    color: var(--white);
    text-align: center;
    position: relative;
}

.sidebar-header h1 {
    font-size: 1.5rem;
    margin: 0;
}

.sidebar-header h2 {
    font-size: 1.2rem;
    margin: 0;
    font-weight: 500;
}

.sidebar-header .header-btn {
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.2);
    border: none;
    color: var(--white);
    padding: 6px var(--space-md);
    border-radius: var(--radius);
    cursor: pointer;
    transition: background var(--transition);
}

.sidebar-header .header-btn:hover {
    background: rgba(0, 0, 0, 0.3);
}

.sidebar-header .header-btn.all-hidden {
    opacity: 0.6;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
}

#sidebar .sidebar-content {
    padding: var(--space-lg);
}

#elements-sidebar .sidebar-content {
    padding: 0;
}

/* ==========================================================================
   Sections (collapsible)
   ========================================================================== */
.section {
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
    padding-bottom: var(--space-lg);
}

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

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    margin-bottom: var(--space-md);
    font-size: 1rem;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.section-toggle {
    font-size: 0.8rem;
    transition: transform var(--transition-slow);
}

.section.collapsed .section-toggle {
    transform: rotate(-90deg);
}

.section-content {
    overflow: hidden;
    transition: max-height var(--transition-slow), opacity var(--transition-slow);
    max-height: 1000px;
    opacity: 1;
}

.section.collapsed .section-content {
    max-height: 0;
    opacity: 0;
    margin: 0;
    padding: 0;
}

h3 {
    margin-bottom: var(--space-md);
    font-size: 1rem;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ==========================================================================
   Base Form Controls
   ========================================================================== */
input[type="text"],
input[type="number"],
textarea,
select {
    padding: var(--space-sm);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: var(--font-size-base);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
}

/* ==========================================================================
   Search Box
   ========================================================================== */
.search-box {
    display: flex;
    gap: 5px;
}

#search-input {
    flex: 1;
}

#search-btn {
    padding: var(--space-sm) 12px;
    background-color: var(--accent);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
}

#search-btn:hover {
    background-color: var(--accent-hover);
}

/* ==========================================================================
   Tools Grid
   ========================================================================== */
.tools-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.tool-btn {
    padding: var(--space-md);
    background-color: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    transition: all var(--transition);
}

.tool-btn:hover {
    background-color: #e2e6ea;
}

.tool-btn.active {
    background-color: var(--accent);
    color: var(--white);
    border-color: var(--accent);
}

/* ==========================================================================
   Converter Section
   ========================================================================== */
.converter-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.converter-input-row {
    display: flex;
}

#dms-input {
    flex: 1;
}

#dms-input::placeholder {
    font-size: 0.8rem;
    color: var(--text-light);
}

.converter-result {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background-color: var(--bg-light);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.converter-result span {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 0.95rem;
}

.icon-btn {
    padding: 6px var(--space-md);
    background-color: var(--accent);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background-color var(--transition);
}

.icon-btn:hover {
    background-color: var(--accent-hover);
}

/* ==========================================================================
   Layers Control
   ========================================================================== */
.layer-option {
    margin-bottom: var(--space-sm);
}

.layer-option label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
}

select {
    width: 100%;
    margin-top: 5px;
}

#opacity-control,
#buffer-radius-control {
    margin-top: 5px;
    padding-left: 24px;
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

#opacity-control input,
#buffer-radius-control input[type="range"] {
    flex: 1;
}

#contour-controls {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    margin-left: var(--space-sm);
}

#contour-controls input[type="number"] {
    width: 70px;
    padding: 2px var(--space-xs);
    font-size: var(--font-size-sm);
}

#contour-controls>span {
    font-size: var(--font-size-sm);
    color: #666;
}

/* ==========================================================================
   Elements List
   ========================================================================== */
#elements-list {
    overflow-y: auto;
    padding: var(--space-lg);
    height: 100%;
}

.element-item {
    background-color: var(--white);
    border: 1px solid var(--border);
    border-left: 4px solid;
    border-radius: var(--radius);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    padding: 0;
    overflow: hidden;
    position: relative;
    transition: box-shadow var(--transition);
}

.element-item:hover {
    box-shadow: var(--shadow-sm);
    background-color: var(--bg-light);
}

.element-item.dragging {
    opacity: 0.5;
}

.element-item.element-hidden {
    opacity: 0.5;
}

/* Marker highlight on menu hover */
.marker-highlighted {
    filter: drop-shadow(0 0 4px rgba(255, 15, 15, 0.9)) drop-shadow(0 0 8px rgba(255, 15, 15, 0.9));
    transform: scale(1.3);
    transition: transform 0.1s ease, filter 0.1s ease;
    z-index: 10000 !important;
}

/* Tooltip styling */
.element-tooltip {
    background-color: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--font-size-sm);
    font-family: var(--font-sans);
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

.element-tooltip::before {
    border-top-color: var(--primary) !important;
}

.element-item.element-hidden .element-title {
    text-decoration: line-through;
    color: var(--text-light);
}

.element-info {
    flex: 1;
    padding: var(--space-md);
    cursor: pointer;
}

.element-title {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: var(--space-xs);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.element-details {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.element-edit,
.element-delete,
.element-visibility {
    background: none;
    border: none;
    color: #bdc3c7;
    padding: 0 var(--space-sm);
    cursor: pointer;
    font-size: var(--font-size-base);
    height: 100%;
    display: flex;
    align-items: center;
}

.element-edit:hover {
    color: var(--accent);
    background-color: #f0f7ff;
}

.element-delete:hover {
    color: var(--danger);
    background-color: #fff5f5;
}

.element-visibility {
    color: var(--accent);
    padding: 0 var(--space-md);
}

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

.element-visibility.hidden-state {
    color: #bdc3c7;
}

/* ==========================================================================
   Data & Action Buttons
   ========================================================================== */
.data-buttons {
    display: flex;
    gap: var(--space-md);
}

.action-btn {
    flex: 1;
    padding: var(--space-sm);
    background-color: var(--secondary);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

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

.action-btn.small {
    flex: 0;
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--font-size-sm);
}

/* ==========================================================================
   Settings
   ========================================================================== */
.settings-field {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.settings-field label {
    font-weight: 500;
    font-size: var(--font-size-base);
    color: var(--text);
}

.settings-field input[type="text"] {
    font-family: var(--font-mono);
}

/* ==========================================================================
   Modals
   ========================================================================== */
.modal {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--white);
    padding: 20px;
    border-radius: var(--radius-lg);
    width: 300px;
    box-shadow: var(--shadow-md);
}

.modal-content h3 {
    margin-bottom: var(--space-lg);
    color: var(--primary);
}

.modal-content label {
    display: block;
    margin-bottom: 5px;
    font-size: var(--font-size-base);
}

.modal-content input {
    width: 100%;
    margin-bottom: var(--space-lg);
}

.modal-buttons {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-md);
}

.modal-buttons button {
    padding: var(--space-sm) 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background-color: var(--white);
    cursor: pointer;
}

.modal-buttons button.primary {
    background-color: var(--accent);
    color: var(--white);
    border-color: var(--accent);
}

.modal-buttons button:hover {
    opacity: 0.9;
}

/* ==========================================================================
   Context Menu
   ========================================================================== */
.context-menu {
    position: absolute;
    background-color: var(--white);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius);
    z-index: 3000;
    min-width: 180px;
}

.context-menu.hidden {
    display: none;
}

.context-menu ul {
    list-style: none;
    padding: 5px 0;
}

.context-menu li {
    padding: var(--space-sm) var(--space-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--font-size-base);
    color: var(--text);
}

.context-menu li:hover {
    background-color: var(--bg-light);
}

.context-menu li i {
    width: 20px;
    text-align: center;
}

/* ==========================================================================
   Leaflet Customization
   ========================================================================== */
.leaflet-container {
    cursor: crosshair;
}

.drawing-cursor {
    cursor: crosshair !important;
}

.colored-marker-icon {
    background: transparent;
    border: none;
}

.leaflet-popup-content-wrapper {
    border-radius: var(--radius-lg);
    padding: 0;
    overflow: hidden;
}

.leaflet-popup-content {
    margin: 0;
    min-width: 200px;
    width: 280px !important;
}

/* ==========================================================================
   Popup Styles
   ========================================================================== */
.popup-content {
    padding: var(--space-lg);
}

.popup-field {
    margin-bottom: 12px;
}

.popup-label {
    display: block;
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-xs);
    color: var(--secondary);
}

.popup-input,
.popup-textarea {
    width: 100%;
}

.popup-textarea {
    resize: vertical;
    min-height: 60px;
}

.popup-buttons {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.popup-btn {
    flex: 1;
    padding: var(--space-sm);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 600;
    font-size: var(--font-size-base);
    color: var(--white);
    transition: opacity var(--transition);
}

.popup-btn:hover {
    opacity: 0.9;
}

.popup-btn-save,
.popup-btn-delete {
    background-color: var(--success);
}

.computed-value {
    display: inline-block;
    padding: var(--space-sm);
    background-color: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: #16a085;
    width: 100%;
}

/* Centroid weighted-vertices table */
.centroid-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 11px;
}

.centroid-table th,
.centroid-table td {
    padding: 2px 3px;
    border: 1px solid var(--border);
    text-align: center;
}

.centroid-table thead th {
    background-color: var(--bg-light);
    font-weight: 600;
    color: var(--secondary);
}

.centroid-table .ctd-idx {
    color: var(--secondary);
    font-weight: 600;
    width: 18px;
}

.centroid-table input {
    width: 100%;
    border: none;
    background: transparent;
    text-align: center;
    font-size: 11px;
    padding: 1px 0;
    outline: none;
}

.centroid-table input:focus {
    background-color: #eaf4fb;
    border-radius: 2px;
}

/* Hide number input spinners globally */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
    appearance: textfield;
}

/* ==========================================================================
   Measurement Status & Results
   ========================================================================== */
.measurement-status {
    margin-top: var(--space-md);
    padding: var(--space-md);
    background-color: #fff3cd;
    border: 1px solid var(--warning);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--font-size-sm);
}

.measurement-status.hidden {
    display: none;
}

.cancel-btn {
    background: none;
    border: none;
    color: #856404;
    cursor: pointer;
    padding: 2px 6px;
    font-size: 1rem;
}

.cancel-btn:hover {
    color: #533f03;
}

.measurement-result-content {
    background-color: var(--bg-light);
    padding: var(--space-lg);
    border-radius: var(--radius);
    margin-bottom: var(--space-lg);
    font-family: var(--font-mono);
}

.measurement-result-content .result-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-sm);
    border-bottom: 1px dashed var(--border);
}

.measurement-result-content .result-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.measurement-result-content .result-label {
    font-weight: 600;
    color: var(--secondary);
}

.measurement-result-content .result-value {
    color: #16a085;
    font-weight: bold;
}

/* ==========================================================================
   Folders
   ========================================================================== */
.folder-item {
    background-color: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: var(--space-md);
    overflow: hidden;
}

.folder-header {
    display: flex;
    align-items: center;
    padding: var(--space-md);
    background-color: var(--secondary);
    color: var(--white);
    cursor: pointer;
    user-select: none;
}

.folder-header:hover {
    background-color: var(--primary);
}

.folder-toggle {
    width: 20px;
    text-align: center;
    transition: transform var(--transition);
}

.folder-item.collapsed .folder-toggle {
    transform: rotate(-90deg);
}

.folder-title {
    flex: 1;
    font-weight: 600;
    font-size: var(--font-size-base);
    margin-left: var(--space-sm);
}

.folder-title-input {
    flex: 1;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--white);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    margin-left: var(--space-sm);
    font-weight: 600;
    font-size: var(--font-size-base);
}

.folder-title-input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.6);
}

.folder-actions {
    display: flex;
    gap: 5px;
}

.folder-btn {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    padding: var(--space-xs) 6px;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-sm);
}

.folder-btn:hover {
    background-color: rgba(0, 0, 0, 0.2);
    color: var(--white);
}

.folder-btn.hidden-state {
    color: rgba(255, 255, 255, 0.4);
}

.folder-content {
    padding: 5px;
    max-height: 2000px;
    overflow: hidden;
    transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.folder-item.collapsed .folder-content {
    max-height: 0;
    padding: 0 5px;
}

.folder-count {
    font-size: 0.75rem;
    background-color: rgba(255, 255, 255, 0.2);
    padding: 2px 6px;
    border-radius: var(--radius-pill);
    margin-left: 5px;
}

/* ==========================================================================
   Root Elements & Add Folder
   ========================================================================== */
.root-elements {
    margin-bottom: var(--space-md);
}

.add-folder-btn {
    width: 100%;
    padding: var(--space-md);
    background-color: var(--bg-light);
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    color: var(--secondary);
    font-size: var(--font-size-base);
    margin-bottom: var(--space-md);
    transition: all var(--transition);
}

.add-folder-btn:hover {
    background-color: #e8e9ed;
    border-color: var(--secondary);
}

/* ==========================================================================
   Drag & Drop
   ========================================================================== */
.folder-content.drag-over,
.root-elements.drag-over {
    background-color: rgba(52, 152, 219, 0.1);
    border: 2px dashed var(--accent);
    border-radius: var(--radius);
}

.root-elements.drag-over {
    min-height: 50px;
}