/* UX Mockup Tool Styles - Light Mode */
:root {
    --bg: #F5F5F7;
    --surface: #FFFFFF;
    --surface-hover: #F0F0F2;
    --accent: #5E5CE6;
    --accent-hover: #4A48C8;
    --text: #1D1D1F;
    --text-dim: #86868B;
    --border: rgba(0, 0, 0, 0.08);
    --sidebar-width: 220px;
    --toolbar-height: 48px;
    --props-width: 260px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    overflow: hidden;
    height: 100vh;
}

/* Layout */
.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.toolbar {
    height: var(--toolbar-height);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 12px;
    gap: 8px;
}

.main {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Toolbar */
.tool-group {
    display: flex;
    gap: 4px;
    padding: 0 8px;
    border-right: 1px solid var(--border);
}

.tool-group:last-child {
    border-right: none;
}

.tool-btn {
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dim);
    transition: all 0.15s;
}

.tool-btn:hover {
    background: var(--surface-hover);
    color: var(--text);
}

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

.tool-btn svg {
    width: 20px;
    height: 20px;
}

.spacer {
    flex: 1;
}

.file-btn {
    background: var(--surface-hover);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 14px;
    color: var(--text);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.15s;
}

.file-btn:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.file-btn.primary {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.file-btn.primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

/* Layers Panel */
.layers-panel {
    width: var(--sidebar-width);
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.panel-header {
    padding: 12px 16px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    border-bottom: 1px solid var(--border);
}

.layers-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.layer-item {
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.1s;
}

.layer-item:hover {
    background: var(--surface-hover);
}

.layer-item.selected {
    background: var(--accent);
    color: white;
}

.layer-icon {
    font-size: 14px;
    opacity: 0.7;
}

.layer-name {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Canvas Area */
.canvas-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: #E8E8ED;
    background-image: radial-gradient(circle, #C7C7CC 1px, transparent 1px);
    background-size: 20px 20px;
}

#canvas {
    position: absolute;
    top: 0;
    left: 0;
    cursor: crosshair;
}

/* Properties Panel */
.props-panel {
    width: var(--props-width);
    background: var(--surface);
    border-left: 1px solid var(--border);
    overflow-y: auto;
}

.prop-section {
    padding: 16px;
    border-bottom: 1px solid var(--border);
}

.prop-section-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    margin-bottom: 12px;
}

.prop-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.prop-row:last-child {
    margin-bottom: 0;
}

.prop-label {
    width: 32px;
    font-size: 12px;
    color: var(--text-dim);
}

.prop-input {
    flex: 1;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 10px;
    color: var(--text);
    font-size: 13px;
    font-family: inherit;
    outline: none;
}

.prop-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(94, 92, 230, 0.1);
}

.prop-input[type="color"] {
    padding: 2px;
    height: 32px;
    cursor: pointer;
}

.prop-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.prop-grid .prop-row {
    margin-bottom: 0;
}

.prop-row-pair {
    display: flex;
    gap: 8px;
}

.prop-row-pair .prop-row {
    flex: 1;
    margin-bottom: 0;
}

.prop-grid-label {
    grid-column: span 2;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-dim);
    margin-top: 8px;
}

.prop-grid-label:first-child {
    margin-top: 0;
}

select.prop-input {
    cursor: pointer;
}

.no-selection {
    padding: 40px 20px;
    text-align: center;
    color: var(--text-dim);
    font-size: 13px;
}

/* Text input overlay */
#textOverlay {
    position: absolute;
    display: none;
    background: white;
    border: 2px solid var(--accent);
    padding: 4px 8px;
    color: var(--text);
    font-family: inherit;
    outline: none;
    resize: none;
    overflow: hidden;
    z-index: 100;
    border-radius: 4px;
}

/* Hidden file input */
#fileInput {
    display: none;
}