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

:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --bg-surface: #1e2a4a;
    --text-primary: #e8e8e8;
    --text-secondary: #a0a8c0;
    --text-muted: #6a7290;
    --accent: #4fc3f7;
    --accent-dim: #2a7fa0;
    --accent-bg: rgba(79, 195, 247, 0.12);
    --danger: #ef5350;
    --success: #66bb6a;
    --warning: #ffa726;
    --border: #2a3a5c;
    --border-light: #3a4a6c;
    --radius: 6px;
    --radius-lg: 10px;
    --shadow: 0 2px 8px rgba(0,0,0,0.3);
    --font: 'Inter', system-ui, -apple-system, sans-serif;
    --toolbar-h: 48px;
    --panel-w: 240px;
}

html, body { height: 100%; overflow: hidden; }
body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.4;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Toolbar */
#toolbar {
    height: var(--toolbar-h);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 12px;
    gap: 8px;
    flex-shrink: 0;
}
.tb-group {
    display: flex;
    gap: 4px;
    padding: 0 8px;
    border-right: 1px solid var(--border);
}
.tb-group:last-child { border-right: none; margin-left: auto; }
.tb-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    padding: 6px 10px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 13px;
    font-family: var(--font);
    transition: all 0.15s;
    white-space: nowrap;
}
.tb-btn:hover { background: var(--bg-surface); color: var(--text-primary); }
.tb-btn.active { background: var(--accent-bg); color: var(--accent); border-color: var(--accent-dim); }
.tb-btn.primary {
    background: var(--accent);
    color: #000;
    font-weight: 600;
}
.tb-btn.primary:hover { background: #6dd5ff; }

/* Main layout */
#main {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Panels */
aside {
    width: var(--panel-w);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}
#panel-props { border-right: none; border-left: 1px solid var(--border); }
.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.panel-header h3 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}
.small-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 24px;
    height: 24px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.small-btn:hover { background: var(--bg-surface); color: var(--text-primary); }

/* Layers list */
#layers-list {
    flex: 1;
    overflow-y: auto;
    padding: 4px;
}
.layer-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 13px;
    transition: background 0.12s;
    user-select: none;
}
.layer-item:hover { background: var(--bg-surface); }
.layer-item.selected { background: var(--accent-bg); color: var(--accent); }
.layer-item .layer-icon { flex-shrink: 0; width: 18px; height: 18px; color: var(--text-muted); }
.layer-item.selected .layer-icon { color: var(--accent); }
.layer-item .layer-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.layer-item .layer-actions { display: flex; gap: 2px; }
.layer-item .layer-actions button {
    background: none; border: none; color: var(--text-muted); cursor: pointer;
    width: 22px; height: 22px; border-radius: 3px; display: flex; align-items: center; justify-content: center;
    font-size: 14px;
}
.layer-item .layer-actions button:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); }
.layer-item .layer-actions button.hidden { color: var(--danger); }
.layer-item.dragging { opacity: 0.5; }
.layer-item.drag-over { border-top: 2px solid var(--accent); }

/* Workspace */
#workspace {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: #0d0d1a;
    position: relative;
    overflow: hidden;
}
#canvas-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    overflow: auto;
    padding: 20px;
}
#canvas-area {
    position: relative;
    width: 1280px;
    height: 800px;
    background: #fff;
    box-shadow: 0 4px 30px rgba(0,0,0,0.5);
    overflow: hidden;
    transform-origin: center center;
}
#canvas-area.dragging { cursor: grabbing; }
#canvas-area.resizing { cursor: nwse-resize; }
#canvas-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
}
#canvas-elements { position: absolute; inset: 0; }
#selection-box {
    position: absolute;
    pointer-events: none;
    border: 2px solid var(--accent);
    background: rgba(79, 195, 247, 0.06);
    display: none;
    z-index: 999;
}
#selection-box.visible { display: block; }

.canvas-el {
    position: absolute;
    cursor: move;
    user-select: none;
    min-width: 20px;
    min-height: 20px;
}
.canvas-el.selected {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}
.canvas-el .resize-handle {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--accent);
    border: 1px solid #fff;
    border-radius: 2px;
    display: none;
    z-index: 10;
}
.canvas-el.selected .resize-handle { display: block; }
.resize-handle.nw { top: -5px; left: -5px; cursor: nw-resize; }
.resize-handle.ne { top: -5px; right: -5px; cursor: ne-resize; }
.resize-handle.sw { bottom: -5px; left: -5px; cursor: sw-resize; }
.resize-handle.se { bottom: -5px; right: -5px; cursor: se-resize; }
.resize-handle.n { top: -5px; left: 50%; margin-left: -5px; cursor: n-resize; }
.resize-handle.s { bottom: -5px; left: 50%; margin-left: -5px; cursor: s-resize; }
.resize-handle.e { right: -5px; top: 50%; margin-top: -5px; cursor: e-resize; }
.resize-handle.w { left: -5px; top: 50%; margin-top: -5px; cursor: w-resize; }

/* Canvas text element */
.canvas-el.text-el {
    padding: 4px 8px;
    overflow: hidden;
    word-break: break-word;
    line-height: 1.3;
}
.canvas-el.text-el.editing {
    cursor: text;
    outline: 2px solid var(--accent);
    z-index: 100;
}

/* Canvas icon element */
.canvas-el.icon-el {
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.canvas-el.icon-el svg { width: 100%; height: 100%; display: block; }
.canvas-el.icon-el .icon-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.canvas-el.icon-el .icon-container.rect { border-radius: 4px; }
.canvas-el.icon-el .icon-container.circle { border-radius: 50%; }

/* Canvas image element */
.canvas-el.image-el { overflow: hidden; }
.canvas-el.image-el img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    pointer-events: none;
}

/* Info bar */
#canvas-info {
    height: 32px;
    flex-shrink: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--text-muted);
    width: 100%;
}

/* Properties panel */
#props-content {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}
.props-empty {
    text-align: center;
    color: var(--text-muted);
    padding: 20px;
    font-size: 13px;
}
.prop-group { margin-bottom: 14px; }
.prop-label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.prop-row {
    display: flex;
    gap: 8px;
    margin-bottom: 6px;
}
.prop-field { flex: 1; }
.prop-field label {
    display: block;
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 2px;
}
.prop-field input,
.prop-field select,
.prop-field textarea {
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 5px 8px;
    border-radius: 4px;
    font-size: 13px;
    font-family: var(--font);
}
.prop-field input:focus,
.prop-field select:focus,
.prop-field textarea:focus {
    outline: none;
    border-color: var(--accent);
}
.prop-field input[type="color"] {
    height: 32px;
    padding: 2px;
    cursor: pointer;
}
.prop-field input[type="range"] {
    padding: 0;
    accent-color: var(--accent);
}
.prop-field .range-value {
    font-size: 11px;
    color: var(--text-secondary);
    text-align: right;
}
.btn-group {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}
.btn-option {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.12s;
    font-family: var(--font);
}
.btn-option:hover { background: var(--bg-surface); }
.btn-option.active { background: var(--accent-bg); color: var(--accent); border-color: var(--accent); }

/* Dialog */
#dialog-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
#dialog-overlay.hidden { display: none; }
#dialog-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    width: 600px;
    max-width: 90vw;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}
#dialog-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
}
#dialog-header h3 { font-size: 16px; font-weight: 600; }
.dialog-close {
    background: none; border: none; color: var(--text-muted);
    font-size: 24px; cursor: pointer;
}
.dialog-close:hover { color: var(--text-primary); }
#dialog-body {
    flex: 1;
    overflow-y: auto;
    padding: 18px;
}

/* Background dialog */
.bg-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.bg-option {
    aspect-ratio: 16/10;
    border-radius: var(--radius);
    border: 2px solid var(--border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.15s;
    position: relative;
    overflow: hidden;
}
.bg-option:hover { border-color: var(--accent-dim); }
.bg-option.active { border-color: var(--accent); }
.bg-option .bg-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.6);
    padding: 4px 8px;
    font-size: 11px;
    text-align: center;
    color: var(--text-primary);
}

/* Icon palette */
.icon-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
    gap: 6px;
    max-height: 300px;
    overflow-y: auto;
}
.icon-grid-item {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.12s;
    padding: 6px;
}
.icon-grid-item:hover { background: var(--bg-surface); border-color: var(--accent-dim); }
.icon-grid-item svg { width: 100%; height: 100%; fill: currentColor; color: var(--text-primary); }
.icon-categories {
    display: flex;
    gap: 4px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}
.icon-cat-btn {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    cursor: pointer;
    transition: all 0.12s;
}
.icon-cat-btn:hover { background: var(--bg-surface); }
.icon-cat-btn.active { background: var(--accent-bg); color: var(--accent); border-color: var(--accent); }

/* Image adjustments */
.image-controls { display: flex; flex-direction: column; gap: 12px; }
.image-controls .control-row { display: flex; flex-direction: column; gap: 4px; }
.image-controls .control-row label { font-size: 12px; color: var(--text-secondary); }
.image-controls .control-row input[type="range"] { width: 100%; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* Zoom display */
#zoom-display {
    font-variant-numeric: tabular-nums;
    user-select: none;
}

/* Slider track styling */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 2px;
    background: var(--border);
    outline: none;
    transition: background 0.15s;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid var(--bg-primary);
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
    transition: transform 0.1s;
}
input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}
input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid var(--bg-primary);
}
input[type="range"]:hover {
    background: var(--border-light);
}

/* Select styling */
select {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 5px 8px;
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
}
select:focus {
    outline: none;
    border-color: var(--accent);
}
select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 4px;
}

/* Responsive */
@media (max-width: 1100px) {
    aside { width: 200px; }
}
@media (max-width: 800px) {
    aside { display: none; }
    #toolbar { flex-wrap: wrap; height: auto; padding: 6px 8px; }
    .tb-group { padding: 0 4px; }
}