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

:root {
    --ink:        #0a192f;
    --ink-mid:    #112240;
    --accent:     #f0c040;
    --accent-dim: rgba(240,192,64,0.12);
    --text:       #e6f1ff;
    --muted:      #6a8a9a;
    --border:     rgba(255,255,255,0.08);
    --danger:     #ff4d4d;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--ink);
    color: var(--text);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    height: 52px;
    background: var(--ink-mid);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

header h1 {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 20px;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.04em;
}

header button {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 13px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 5px;
    border: 1px solid var(--border);
    background: var(--accent);
    color: var(--ink);
    cursor: pointer;
    letter-spacing: 0.05em;
    transition: all 0.15s;
}

header button:hover { background: #f5cc55; }
#count-btn {
    background: transparent;
    color: var(--muted);
    cursor: default;
    border: 1px solid var(--border);
}
.tool_area {
    display: flex;
    flex: 1;
    overflow: hidden;
}

aside {
    width: 200px;
    background: var(--ink-mid);
    border-right: 1px solid var(--border);
    padding: 12px;
    overflow-y: auto;
    flex-shrink: 0;
}

aside h2 {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    margin-bottom: 8px;
}

.asset-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 7px 10px;
    margin-bottom: 4px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text);
    text-align: left;
    transition: all 0.15s;
}

.asset-btn:hover {
    background: var(--accent-dim);
    border-color: rgba(240,192,64,0.4);
}

#canvas {
    flex: 1;
    position: relative;
    overflow: hidden;
    background-color: #0d1b2a;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

#canvas::after {
    content: '';
    position: absolute; 
    inset: 0;
    pointer-events: none;
    background-image: radial-gradient(circle, #1a3a5a 1px, transparent 1px);
    background-size: 36px 36px;
}

#canvas.drag-over::before {
    content: '';
    position: absolute; inset: 10px; z-index: 10;
    border: 2px dashed rgba(240,192,64,0.5);
    border-radius: 10px;
    pointer-events: none;
}

.hint {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    pointer-events: none;
    z-index: 1;
}

.hint p {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.08em;
    margin-top: 8px;
    line-height: 1.7;
}

.asset {
    position: absolute;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: move;
    user-select: none;
    z-index: 5;
}

.asset .emoji { font-size: 32px; line-height: 1; }

.asset .asset_tile {
    position: absolute; inset: -6px;
    border: 1.5px solid transparent;
    border-radius: 10px;
    pointer-events: none;
    transition: all 0.15s;
}

.asset:hover .asset_tile { border-color: rgba(240,192,64,0.5); }

.asset.selected .asset_tile {
    border-color: var(--accent);
    box-shadow: 0 0 10px rgba(240,192,64,0.3);
}

.asset .name {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 9px;
    color: rgba(255,255,255,0.5);
    background: rgba(8,21,32,0.75);
    padding: 2px 7px;
    border-radius: 3px;
    margin-top: 4px;
    white-space: nowrap;
    border: 1px solid rgba(255,255,255,0.07);
}

.asset .delete {
    display: none;
    position: absolute; top: -7px; right: -7px;
    width: 16px; height: 16px;
    background: var(--danger);
    border: none; border-radius: 50%;
    color: white; font-size: 9px;
    cursor: pointer;
    align-items: center; justify-content: center;
    font-weight: 700;
}

.asset:hover .delete,
.asset.selected .delete { display: flex; }