:root {
    --bg: #0c0c0e;
    --panel: #131316;
    --panel2: #1a1a1f;
    --border: #2a2a35;
    --accent: #e8ff4e;
    --accent2: #4ef5ff;
    --accent3: #ff6b6b;
    --text: #e8e8f0;
    --muted: #5a5a70;
    --canvas-bg: #16161c;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Syne', sans-serif;
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* ── HEADER ── */
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 52px;
    border-bottom: 1px solid var(--border);
    background: var(--panel);
    flex-shrink: 0;
    z-index: 10;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 28px;
    height: 28px;
    background: var(--accent);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo span {
    color: var(--accent);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    background: var(--panel2);
    border: 1px solid var(--border);
    padding: 3px 8px;
    border-radius: 3px;
    color: var(--muted);
}

/* ── MAIN LAYOUT ── */
.app-body {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ── TOOLBAR ── */
.toolbar {
    width: 60px;
    background: var(--panel);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 0;
    gap: 4px;
    flex-shrink: 0;
}

.tool-sep {
    width: 32px;
    height: 1px;
    background: var(--border);
    margin: 6px 0;
}

.tool-btn {
    width: 40px;
    height: 40px;
    background: none;
    border: 1px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    font-size: 18px;
    transition: all 0.15s;
    position: relative;
}

.tool-btn:hover {
    background: var(--panel2);
    color: var(--text);
    border-color: var(--border);
}

.tool-btn.active {
    background: var(--accent);
    color: #000;
    border-color: var(--accent);
}

.tool-btn.active svg {
    stroke: #000 !important;
}

.tool-btn svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.tool-tooltip {
    position: absolute;
    left: calc(100% + 10px);
    background: var(--panel2);
    border: 1px solid var(--border);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s;
    z-index: 100;
    font-family: 'JetBrains Mono', monospace;
}

.tool-btn:hover .tool-tooltip {
    opacity: 1;
}

/* ── PANELS ── */
.left-panel,
.right-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.right-panel {
    border-left: 1px solid var(--border);
}

.panel-header {
    height: 38px;
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 10px;
    flex-shrink: 0;
}

.panel-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--muted);
    font-family: 'JetBrains Mono', monospace;
}

.panel-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
}

.panel-dot.blue {
    background: var(--accent2);
}

/* ── CANVAS AREA ── */
.canvas-wrap {
    flex: 1;
    background: var(--canvas-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.canvas-wrap::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 20px 20px;
    pointer-events: none;
}

#drawCanvas {
    background: #1e1e26;
    border: 1px solid var(--border);
    cursor: crosshair;
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.5);
    position: relative;
    z-index: 1;
    display: block;
}

/* ── OPTIONS BAR ── */
.options-bar {
    height: 44px;
    background: var(--panel);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 14px;
    gap: 16px;
    flex-shrink: 0;
    overflow-x: auto;
}

.opt-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.opt-label {
    font-size: 10px;
    color: var(--muted);
    font-family: 'JetBrains Mono', monospace;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.color-swatch {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    border: 2px solid var(--border);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

.color-swatch input[type="color"] {
    position: absolute;
    inset: -4px;
    width: calc(100% + 8px);
    height: calc(100% + 8px);
    opacity: 0;
    cursor: pointer;
    border: none;
}

.swatch-preview {
    position: absolute;
    inset: 0;
    border-radius: 2px;
}

input[type="range"] {
    -webkit-appearance: none;
    width: 70px;
    height: 3px;
    background: var(--border);
    border-radius: 2px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
}

.range-val {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text);
    min-width: 24px;
    text-align: center;
}

.opt-sep {
    width: 1px;
    height: 20px;
    background: var(--border);
}

.opt-btn {
    height: 26px;
    padding: 0 10px;
    background: var(--panel2);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-size: 11px;
    font-family: 'JetBrains Mono', monospace;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.opt-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.opt-btn.danger:hover {
    border-color: var(--accent3);
    color: var(--accent3);
}

/* ── PREVIEW PANEL ── */
.preview-wrap {
    flex: 1;
    background: var(--canvas-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.preview-wrap::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 20px 20px;
    pointer-events: none;
}

#previewContainer {
    background: #1e1e26;
    border: 1px solid var(--border);
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.5);
    position: relative;
    z-index: 1;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

#previewContainer svg {
    width: 100%;
    height: 100%;
}

/* ── CODE PANEL ── */
.code-panel {
    height: 200px;
    background: var(--panel);
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.code-header {
    height: 38px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 10px;
    flex-shrink: 0;
}

.code-header .panel-label {
    flex: 1;
}

.copy-btn {
    height: 26px;
    padding: 0 12px;
    background: var(--accent);
    border: none;
    border-radius: 4px;
    color: #000;
    font-size: 11px;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    gap: 6px;
    letter-spacing: 0.5px;
}

.copy-btn:hover {
    background: #fff;
    transform: scale(1.03);
}

.copy-btn.copied {
    background: #4eff8a;
}

.copy-btn svg {
    width: 12px;
    height: 12px;
    stroke: #000;
    fill: none;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.download-btn {
    height: 26px;
    padding: 0 12px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-size: 11px;
    font-family: 'JetBrains Mono', monospace;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.download-btn:hover {
    border-color: var(--accent2);
    color: var(--accent2);
}

.download-btn svg {
    width: 12px;
    height: 12px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

#codeOutput {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    color: var(--accent2);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    line-height: 1.6;
    padding: 12px 16px;
    overflow-y: auto;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

/* ── STROKE STYLE BUTTONS ── */
.stroke-style-btn {
    height: 26px;
    padding: 0 8px;
    background: var(--panel2);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--muted);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
}

.stroke-style-btn.active {
    border-color: var(--accent);
    color: var(--accent);
}

/* ── CHECKERED (transparent indicator) ── */
.transparent-swatch {
    background:
        linear-gradient(45deg, #888 25%, transparent 25%),
        linear-gradient(-45deg, #888 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #888 75%),
        linear-gradient(-45deg, transparent 75%, #888 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
    background-color: #fff;
}

/* ── TOOLTIP on canvas size ── */
.canvas-size-info {
    position: absolute;
    top: 10px;
    left: 10px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    color: var(--muted);
    z-index: 2;
    pointer-events: none;
}