:root {
    --bg-color: #fff;
    --text-color: #212529;
    --panel-bg-color: #f8f9fa;
    --panel-bg-color-rgb: 248, 249, 250;
    --panel-border-color: #dee2e6;
    --canvas-bg-color: #e9ecef;
    --canvas-border-color: #ccc;
    --list-group-item-bg: #fff;
    --list-group-item-border: #ddd;
    --list-group-item-active-bg: #d3e5ff;
    --list-group-item-active-border: #a8caff;
    --list-group-item-active-text: #000;
    --input-bg: #fff;
    --input-border: #ced4da;
    --input-text: #495057;
}

body.dark-mode {
    /* Core Colors */
    --bg-color: #1a1d21;
    --text-color: #f1f1f1; /* Brighter text for better contrast */
    --panel-bg-color: #2c2f33;
    --panel-bg-color-rgb: 44, 47, 51;
    --panel-border-color: #40444b;
    --canvas-bg-color: #23272a;
    --canvas-border-color: #54585d;
    --input-bg: #3a3f44;
    --input-border: #54585d;
    --input-text: #f1f1f1;

    /* Primary/Accent Colors (Less saturated blue) */
    --dm-primary-bg: #3675b3;
    --dm-primary-hover-bg: #2a5a8a;
    --dm-primary-text: #ffffff;

    /* List Selection Colors */
    --list-group-item-bg: #2c2f33;
    --list-group-item-border: #40444b;
    --list-group-item-active-bg: #2a3b4d; /* Desaturated blue selection */
    --list-group-item-active-border: #3675b3;
    --list-group-item-active-text: #ffffff;

    /* Secondary Button Colors */
    --dm-secondary-bg: #5f6368;
    --dm-secondary-hover-bg: #4a4f54;
    --dm-secondary-text: #f1f1f1;

    /* Success Button Colors */
    --dm-success-bg: #2a7e41; /* Desaturated green */
    --dm-success-hover-bg: #1e5a2f;
    --dm-success-text: #ffffff;
    
    /* Outline Secondary Button Colors (Improved visibility) */
    --dm-outline-secondary-text: #c5c8cc;
    --dm-outline-secondary-border: #5f6368;
    --dm-outline-secondary-hover-bg: #40444b;
    --dm-outline-secondary-hover-text: #ffffff;
}

/* --- Button Overrides for Dark Mode --- */
body.dark-mode .btn-primary {
    background-color: var(--dm-primary-bg);
    border-color: var(--dm-primary-bg);
    color: var(--dm-primary-text);
}
body.dark-mode .btn-primary:hover {
    background-color: var(--dm-primary-hover-bg);
    border-color: var(--dm-primary-hover-bg);
}

body.dark-mode .btn-secondary {
    background-color: var(--dm-secondary-bg);
    border-color: var(--dm-secondary-bg);
    color: var(--dm-secondary-text);
}
body.dark-mode .btn-secondary:hover {
    background-color: var(--dm-secondary-hover-bg);
    border-color: var(--dm-secondary-hover-bg);
}

body.dark-mode .btn-outline-primary {
    color: var(--dm-primary-bg);
    border-color: var(--dm-primary-bg);
}
body.dark-mode .btn-outline-primary:hover {
    background-color: var(--dm-primary-bg);
    color: var(--dm-primary-text);
}

body.dark-mode .btn-outline-secondary {
    color: var(--dm-outline-secondary-text);
    border-color: var(--dm-outline-secondary-border);
}
body.dark-mode .btn-outline-secondary:hover {
    background-color: var(--dm-outline-secondary-hover-bg);
    color: var(--dm-outline-secondary-hover-text);
    border-color: var(--dm-outline-secondary-border);
}
body.dark-mode .btn-outline-secondary.active {
    background-color: var(--dm-outline-secondary-hover-bg);
    color: var(--dm-outline-secondary-hover-text);
    border-color: var(--dm-outline-secondary-border);
}

body.dark-mode .btn-outline-danger {
    color: #e57373; /* Softer red */
    border-color: #e57373;
}
body.dark-mode .btn-outline-danger:hover {
    background-color: #e57373;
    color: #1a1d21;
}

body.dark-mode .btn-success {
    background-color: var(--dm-success-bg);
    border-color: var(--dm-success-bg);
    color: var(--dm-success-text);
}
body.dark-mode .btn-success:hover {
    background-color: var(--dm-success-hover-bg);
    border-color: var(--dm-success-hover-bg);
}

body.dark-mode .btn-danger {
    background-color: #dc3545;
    border-color: #dc3545;
    color: #ffffff;
}
body.dark-mode .btn-danger:hover {
    background-color: #b02a37;
    border-color: #b02a37;
}

body.dark-mode .form-control:focus {
    border-color: var(--dm-primary-bg);
    box-shadow: 0 0 0 0.25rem rgba(54, 117, 179, 0.25);
}

body.dark-mode .form-control::placeholder {
    color: var(--text-color); /* Use the general text color for placeholders */
    opacity: 0.7; /* Make it slightly transparent */
}

body.dark-mode .form-control {
    color: var(--input-text);
}

body.dark-mode .preview-item.active {
    border-color: var(--list-group-item-active-border);
    box-shadow: 0 0 8px rgba(54, 117, 179, 0.6);
}

/* --- Form Control Overrides for Dark Mode --- */
body.dark-mode .form-check-input {
    background-color: var(--input-bg);
    border-color: var(--input-border);
}
body.dark-mode .form-check-input:checked {
    background-color: var(--dm-primary-bg);
    border-color: var(--dm-primary-bg);
}

body.dark-mode .form-switch .form-check-input {
    background-color: var(--dm-secondary-bg);
    border-color: var(--dm-outline-secondary-border);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23c5c8cc'/%3e%3c/svg%3e");
}
body.dark-mode .form-switch .form-check-input:checked {
    background-color: var(--dm-primary-bg);
    border-color: var(--dm-primary-bg);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23fff'/%3e%3c/svg%3e");
}

body.dark-mode .btn-check:checked+.btn-outline-primary,
body.dark-mode .btn-check:checked+.btn-outline-secondary {
    background-color: var(--dm-primary-bg) !important;
    border-color: var(--dm-primary-bg) !important;
    color: var(--dm-primary-text) !important;
}
body.dark-mode .btn-check:checked+.btn-outline-primary:hover,
body.dark-mode .btn-check:checked+.btn-outline-secondary:hover {
    background-color: var(--dm-primary-hover-bg) !important;
    border-color: var(--dm-primary-hover-bg) !important;
    color: var(--dm-primary-text) !important;
}

body.dark-mode .form-range::-webkit-slider-thumb {
    background: var(--dm-primary-bg);
}
body.dark-mode .form-range::-moz-range-thumb {
    background: var(--dm-primary-bg);
}
body.dark-mode .form-range::-webkit-slider-thumb:active {
    background-color: var(--dm-primary-hover-bg);
}
body.dark-mode .form-range::-moz-range-thumb:active {
    background-color: var(--dm-primary-hover-bg);
}


html, body {
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.navbar {
    flex-shrink: 0;
}

.main-container {
    flex-grow: 1;
    display: flex;
    overflow: hidden; /* Allow internal scrolling for panels */
}

/* This is the new wrapper for the main content and the preview panel */
.content-wrapper {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    overflow: hidden;
}

.control-panel {
    flex-shrink: 0;
    width: 300px; /* Initial width */
    min-width: 200px;
    max-width: 600px;
    overflow-y: auto;
    padding: 1rem;
    background-color: var(--panel-bg-color);
    display: flex;
    flex-direction: column;
    border-left: 1px solid var(--panel-border-color);
    border-right: 1px solid var(--panel-border-color);
    transition: width 0.3s ease, padding 0.3s ease, min-width 0.3s ease;
}

.control-panel.collapsed {
    width: 0;
    min-width: 0;
    padding: 0;
    overflow: hidden;
    border: none;
}

.control-panel .panel-header,
.control-panel .panel-content {
    min-width: 0; /* Prevent flex items from resisting collapse */
    opacity: 1;
    visibility: visible;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.control-panel.collapsed .panel-header,
.control-panel.collapsed .panel-content {
    opacity: 0;
    visibility: hidden;
}

.control-panel .panel-content {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    min-height: 0; /* Crucial for flex-grow to work inside another flex container */
}

.panel-expand-btn {
    position: absolute;
    top: 10px;
    z-index: 11; /* Above preview bar */
}

.panel-splitter {
    flex-shrink: 0;
    width: 5px;
    background-color: var(--panel-border-color);
    cursor: col-resize;
}

.canvas-container {
    flex-grow: 1;
    padding: 0;
    background-color: var(--canvas-bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden; /* Let the inner canvas wrapper handle scroll */
    position: relative; /* For positioning info-display */
}

canvas {
    border: 1px dashed var(--canvas-border-color);
}

#label-list-container, #label-filter-container {
    margin-top: 1rem;
}

.list-group-item {
    cursor: pointer;
    background-color: var(--list-group-item-bg);
    border-color: var(--list-group-item-border);
    color: var(--text-color);
}

.list-group-item.active {
    background-color: var(--list-group-item-active-bg);
    border-color: var(--list-group-item-active-border);
    color: var(--list-group-item-active-text);
}

.form-control {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--input-text);
}

.form-control:focus {
    background-color: var(--input-bg);
    border-color: #86b7fe;
    color: var(--input-text);
}

.form-check-label {
    color: var(--text-color);
}

#toast-container {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.toast-message {
    background-color: rgba(0, 0, 0, 0.75);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    margin-top: 10px;
    font-size: 0.9rem;
    opacity: 0;
    transition: opacity 0.3s, transform 0.3s;
    transform: translateY(20px);
}

.toast-message.show {
    opacity: 1;
    transform: translateY(0);
}

/* Make the image and label lists scrollable */
#image-list {
    max-height: 35vh; /* Adjust this value as needed */
    overflow-y: auto;
    border: 1px solid var(--list-group-item-border);
    border-radius: .25rem;
    background-color: var(--list-group-item-bg);
}

#label-list-container {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-height: 0; /* Important for flex-grow to work in a flex column */
}

#label-list {
    flex-grow: 1;
    overflow-y: auto;
    border: 1px solid var(--list-group-item-border);
    border-radius: .25rem;
    margin-bottom: 0; /* Remove default margin */
    background-color: var(--list-group-item-bg);
}

/* Label Grouping Styles */
.label-group-header {
    cursor: pointer;
    display: flex;
    align-items: center;
    padding: 0.5rem 0.75rem; /* Adjust padding */
    background-color: var(--panel-bg-color); /* Slightly different background */
    border-bottom: 1px solid var(--panel-border-color);
}

.label-group-header:hover {
    background-color: var(--canvas-bg-color);
}

.label-group-header .bi-chevron-right {
    transition: transform 0.2s ease-in-out;
}

.label-group-header:not(.collapsed) .bi-chevron-right {
    transform: rotate(90deg);
}

.label-group-items {
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    background-color: var(--list-group-item-bg);
}

.label-color-swatch {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 1px solid rgba(0,0,0,0.2);
    border-radius: 3px;
}

.select-group-btn {
    cursor: pointer;
    color: #6c757d; /* Bootstrap secondary color */
    font-size: 1.2rem;
    transition: color 0.2s ease, transform 0.2s ease;
}

.select-group-btn:hover {
    color: #0d6efd; /* Bootstrap primary color */
    transform: scale(1.1);
}


#coords-input-container input {
    width: 70px;
}

#info-display,
#label-list,
#coords-input-container input,
#classFileContent {
    font-family: 'Consolas', monospace;
}

#info-display {
    font-size: 0.9rem;
}



/* --- Style for buttons inside active list group items --- */
.list-group-item.active .btn {
    color: var(--list-group-item-active-text);
    border-color: var(--list-group-item-active-text);
}

/* Hover effect for buttons inside active list group items */
.list-group-item.active .btn:hover {
    background-color: var(--list-group-item-active-text);
}

/* Specific hover colors for icons */
.list-group-item.active .btn.edit-btn:hover i {
    color: #0d6efd; /* Blue pencil icon */
}

.list-group-item.active .btn.delete-btn:hover i {
    color: #dc3545; /* Red trash icon */
}

.list-group-item.active .btn:hover i.bi-grip-vertical {
    color: #212529; /* Black grip icon */
}

/* Preview Bar Styles */
#bottom-panel {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    height: 150px; /* Initial height */
    background-color: rgba(var(--panel-bg-color-rgb), 0.9);
    border-top: 1px solid var(--panel-border-color);
    transition: transform 0.3s ease;
    z-index: 10;
    transform: translateY(calc(100% - 38px)); /* Start collapsed, showing only the header (approx 38px) */
}

#bottom-panel.show {
    transform: translateY(0);
}

#bottom-panel.collapsed {
    height: 35px; /* Height of the header */
}

#bottom-splitter {
    height: 5px;
    background-color: var(--panel-border-color);
    cursor: default;
}

#preview-bar-container {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#preview-bar-header {
    flex-shrink: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 15px;
    border-bottom: 1px solid var(--panel-border-color);
    background-color: var(--panel-bg-color);
    cursor: pointer; /* Make header clickable for toggle */
}

#preview-bar-header span {
    font-weight: 500;
}

#toggle-preview-btn i {
    transition: transform 0.3s ease;
}

#bottom-panel.collapsed #toggle-preview-btn i {
    transform: rotate(180deg);
}

#preview-bar {
    flex-grow: 1;
    display: flex;
    align-items: center;
    padding: 10px;
    box-sizing: border-box;
    overflow: hidden;
}

#bottom-panel.collapsed #preview-bar {
    display: none;
}

#preview-list-wrapper {
    flex-grow: 1;
    overflow: hidden;
    height: 100%;
}

#preview-list {
    display: flex;
    height: 100%;
    gap: 10px;
    transition: transform 0.3s ease-in-out;
}

.preview-item {
    height: 100%;
    width: 90px; /* Fixed width for calculation */
    flex-shrink: 0;
    border: 2px solid transparent;
    border-radius: 5px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.6) contrast(1.2);
    transition: filter 0.3s ease-in-out;
}

.preview-item.active img {
    filter: brightness(1) contrast(1);
}

.preview-item.active {
    border-color: #0d6efd;
    box-shadow: 0 0 10px rgba(13, 110, 253, 0.7);
}

#preview-prev-btn, #preview-next-btn {
    flex-shrink: 0;
    margin: 0 5px;
    height: 100%;
    align-self: center;
}

/* Hide arrows from number inputs */
#zoom-input::-webkit-outer-spin-button,
#zoom-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

#zoom-input {
  -moz-appearance: textfield;
}

/* Loading Overlay */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1050; /* Sit below modals but above most other content */
    visibility: hidden;
    opacity: 0;
    transition: visibility 0s linear 0.3s, opacity 0.3s ease;
}

.loading-overlay.show {
    visibility: visible;
    opacity: 1;
    transition: visibility 0s linear 0s, opacity 0.3s ease;
}

.footer {
    flex-shrink: 0;
}

.bg-panel {
    background-color: var(--panel-bg-color) !important;
}