/* --- CSS Variables for Theming --- */
:root {
    --font-family: 'Poppins', sans-serif;
    --bg-color: #1e1e1e;
    --sidebar-bg: #252526;
    --card-bg: #2d2d30;
    --text-color: #d4d4d4;
    --text-color-dark: #888;
    --primary-color: #007acc;
    --primary-color-hover: #009bff;
    --secondary-color: #3e3e42;
    --secondary-color-hover: #505054;
    --border-color: #444444;
    --success-color: #28a745;
    --error-color: #dc3545;
    --shadow-color: rgba(0, 0, 0, 0.2);
}

/* --- General Styles & Reset --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 14px;
    overflow: hidden;
}

h1, h2 {
    font-weight: 600;
    color: #ffffff;
}

h1 { font-size: 24px; }
h2 { font-size: 16px; }

/* --- App Layout --- */
.app-container {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 320px;
    background-color: var(--sidebar-bg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    overflow-y: auto;
    border-right: 1px solid var(--border-color);
}

.sidebar-header {
    text-align: center;
    margin-bottom: 10px;
}

.main-content {
    flex-grow: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

/* --- Card System --- */
.card {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    border: 1px solid var(--border-color);
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.5s ease, transform 0.5s ease;
    display: none; /* Hidden by default */
}

.card.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.card-header {
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

/* --- Forms & Controls --- */
form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

input[type="file"] {
    color: var(--text-color);
    font-family: var(--font-family);
}
input[type="file"]::file-selector-button {
    font-family: var(--font-family);
    padding: 8px 12px;
    border-radius: 4px;
    border: none;
    background-color: var(--secondary-color);
    color: var(--text-color);
    cursor: pointer;
    transition: background-color 0.2s ease;
}
input[type="file"]::file-selector-button:hover {
    background-color: var(--secondary-color-hover);
}

select {
    width: 100%;
    padding: 8px 12px;
    background-color: var(--secondary-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: var(--font-family);
}

.button-primary, .button-secondary {
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    font-family: var(--font-family);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.button-primary {
    background-color: var(--primary-color);
    color: white;
}
.button-primary:hover {
    background-color: var(--primary-color-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}
.button-primary:active {
    transform: translateY(0);
    box-shadow: none;
}

.button-secondary {
    background-color: var(--secondary-color);
    color: var(--text-color);
}
.button-secondary:hover {
    background-color: var(--secondary-color-hover);
}


#controls {
    display: flex;
    flex-direction: column;
    gap: 10px; /* Gap between control sections */
}

.control-section {
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}
.control-section:first-child {
    padding-top: 0;
    border-top: none;
}

.control-section-header {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-color-dark);
    text-transform: uppercase;
    margin-bottom: 15px;
}

.control-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 12px; /* row-gap column-gap */
    margin-bottom: 15px;
}
.control-group:last-child {
    margin-bottom: 0;
}

.control-group label {
    flex-shrink: 0;
    font-weight: 500;
}

.control-group select,
.control-group input[type="number"],
.control-group .button-secondary {
    flex-grow: 1; /* Allow items to grow */
    min-width: 80px; /* Prevent items from becoming too small */
}

.control-group .btn-group {
    display: flex;
    flex-grow: 1;
}
.btn-group .button-secondary {
    border-radius: 0;
}
.btn-group .button-secondary:first-child {
    border-top-left-radius: 5px;
    border-bottom-left-radius: 5px;
}
.btn-group .button-secondary:last-child {
    border-top-right-radius: 5px;
    border-bottom-right-radius: 5px;
}
.btn-group .button-secondary.active {
    background-color: var(--primary-color);
    color: white;
}


.control-group.vertical {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
}

.inset-control-row {
    display: flex;
    align-items: center;
    gap: 10px;
}
.inset-control-row label {
    width: 50px; /* Fixed width for alignment */
    flex-shrink: 0;
}
.inset-control-row select,
.inset-control-row input {
    width: 100%;
}

.control-group-divider {
    height: 1px;
    background-color: var(--border-color);
    width: 100%;
    margin: 5px 0;
}

.control-group-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}
.control-group-grid.four-cols {
    grid-template-columns: 1fr 1fr;
}
.control-group-grid .button-primary,
.control-group-grid .button-secondary {
    width: 100%;
    text-decoration: none;
}

.hint-text {
    font-size: 12px;
    color: var(--text-color-dark);
    text-align: left;
    padding: 0 5px;
}
.hint-text strong {
    color: var(--text-color);
    font-weight: 600;
}


/* --- Bin Definition --- */
#bin-map-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.bin-item {
    display: grid;
    grid-template-columns: 1fr 2fr;
    align-items: center;
}
.bin-item label {
    font-weight: 500;
}

/* --- Main Editor Area --- */
#editor-section, #viewer-section, #comparison-result-section {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
}

#welcome-message {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    color: var(--text-color-dark);
    text-align: center;
}

.counts-container {
    margin-bottom: 15px;
    padding: 10px;
    background-color: var(--card-bg);
    border-radius: 4px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    font-size: 14px;
    border: 1px solid var(--border-color);
}
.count-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}
.count-item span {
    font-weight: 400;
    padding: 3px 8px;
    border-radius: 4px;
    color: white;
    min-width: 30px;
    display: inline-block;
    text-align: center;
}
#result-legend .count-item span {
    width: 20px;
    height: 20px;
    border: 1px solid rgba(255,255,255,0.2);
}


#map-container, #result-map-container {
    flex-grow: 1;
    position: relative;
    cursor: grab;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
}
#map-container:active, #result-map-container:active {
    cursor: grabbing;
}

#wafer-map-canvas, #result-map-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.map-viewer-controls {
    display: flex;
    gap: 15px;
    align-items: center;
    margin-bottom: 15px;
}
.map-viewer-controls label {
    font-weight: 500;
}

/* --- Comparison Page Specifics --- */
.reference-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px;
    border-radius: 4px;
    background-color: var(--secondary-color);
    gap: 10px;
}
.reference-item .filename {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-grow: 1;
}
.reference-item .ref-details {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}
.ref-status {
    font-weight: 500;
    color: var(--text-color-dark);
}
.ref-status.set {
    color: var(--primary-color);
    font-weight: 600;
}
.clear-ref-btn {
    background: none;
    border: none;
    color: var(--text-color-dark);
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    padding: 0 5px;
    display: none; /* Hidden by default */
}
.clear-ref-btn:hover {
    color: var(--error-color);
}

/* --- Tooltip --- */
.map-tooltip {
    position: absolute;
    display: none;
    background-color: rgba(0, 0, 0, 0.85);
    color: white;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 8px 12px;
    font-size: 12px;
    pointer-events: none; /* So it doesn't interfere with mouse events */
    white-space: pre; /* To respect newlines */
    z-index: 100;
    transition: opacity 0.1s ease;
}
.reference-item.has-ref .clear-ref-btn {
    display: inline-block; /* Show only when ref is set */
}



/* --- Status & Spinner --- */
.status {
    margin-top: 15px;
    padding: 10px;
    border-radius: 4px;
    font-weight: 500;
    text-align: center;
    display: none; /* Use classes to show */
}
.status.success {
    background-color: rgba(40, 167, 69, 0.8);
    color: white;
    display: block;
}
.status.error {
    background-color: rgba(220, 53, 69, 0.8);
    color: white;
    display: block;
}

.spinner-border {
    display: inline-block;
    width: 16px;
    height: 16px;
    vertical-align: text-bottom;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner-border .75s linear infinite;
}

@keyframes spinner-border {
    to { transform: rotate(360deg); }
}