:root {
    --bg: #0f172a;
    --panel: #0b1220;
    --card: #0f172a;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --accent: #38bdf8;
    --border: rgba(255, 255, 255, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: radial-gradient(circle at 20% 20%, #0b1430, #060b1a);
    color: var(--text);
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    min-height: 100vh;
}

.app-shell {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 16px;
    max-width: 1400px;
    margin: 0 auto;
}

.topbar {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: flex-start;
    background: linear-gradient(120deg, rgba(56, 189, 248, 0.08), rgba(99, 102, 241, 0.08));
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 14px 16px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.topbar h1 {
    margin: 0 0 4px;
    font-size: 22px;
    font-weight: 700;
}

.topbar p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}

.tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.tags span {
    border: 1px solid var(--border);
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 12px;
    color: var(--muted);
}

.workspace {
    display: flex;
    justify-content: center;
}

.canvas-wrap {
    background: #0f172a;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 12px;
    box-shadow: 0 16px 42px rgba(0, 0, 0, 0.35);
    width: min(100%, 1220px);
}

canvas {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
    background: #ffffff;
    cursor: crosshair;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
    touch-action: none;
}

.toolbar {
    position: sticky;
    bottom: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 10px;
    box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.35);
}

.tool-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.tool-group.grow {
    flex: 1 1 auto;
    min-width: 240px;
}

button,
.upload-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 10px;
    padding: 10px 12px;
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s ease;
}

button:hover,
.upload-btn:hover {
    border-color: rgba(56, 189, 248, 0.7);
    color: #e0f2fe;
}

button.active {
    background: rgba(56, 189, 248, 0.2);
    border-color: rgba(56, 189, 248, 0.9);
    color: #e0f2fe;
}

.upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.field {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-size: 13px;
}

input[type="color"] {
    width: 42px;
    height: 34px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #ffffff;
    padding: 0;
}

input[type="range"] {
    accent-color: var(--accent);
}

.size-field {
    min-width: 200px;
}

.palette {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.swatch {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    padding: 0;
}

.status {
    min-height: 22px;
    font-size: 13px;
    color: var(--muted);
    padding: 0 4px;
}

.status.error {
    color: #fca5a5;
}

@media (max-width: 900px) {
    .topbar {
        flex-direction: column;
    }

    .toolbar {
        position: static;
        flex-direction: column;
        align-items: flex-start;
    }

    .tool-group {
        width: 100%;
    }
}