:root {
    --bg: #0f1115;
    --fg: #e8e8e8;
    --muted: #8a93a6;
    --accent: #4ea1ff;
    --border: #262a33;
    --card: #161a22;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--fg);
    line-height: 1.5;
}
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border);
    background: var(--card);
}
header h1 { margin: 0; font-size: 1.2rem; }
header h1 a { color: var(--fg); text-decoration: none; }
nav a {
    color: var(--accent);
    text-decoration: none;
    margin-left: 1.2rem;
}
nav a:hover { text-decoration: underline; }
main { max-width: 1200px; margin: 2rem auto; padding: 0 2rem; }
h2 { margin-top: 0; }
code, pre {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.1rem 0.3rem;
    font-size: 0.9em;
}
pre { padding: 0.8rem; overflow-x: auto; }
button {
    background: var(--accent);
    color: white;
    border: 0;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}
button:hover { filter: brightness(1.1); }
input, select {
    background: var(--card);
    color: var(--fg);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.4rem;
    font-size: 1rem;
}
form label {
    display: block;
    margin: 0.6rem 0;
}
.flow li { margin: 0.5rem 0; }
.stats { padding: 0; list-style: none; }
.stats li {
    background: var(--card);
    padding: 0.6rem 1rem;
    margin: 0.4rem 0;
    border-left: 3px solid var(--accent);
    border-radius: 4px;
}
table.list {
    width: 100%;
    border-collapse: collapse;
}
table.list th, table.list td {
    padding: 0.6rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: middle;
}
.thumb {
    max-width: 80px;
    max-height: 60px;
    border-radius: 3px;
    border: 1px solid var(--border);
}
.btn {
    background: var(--accent);
    color: white;
    text-decoration: none;
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
}
.label-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 1.5rem;
}
.canvas-wrap {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem;
    overflow: auto;
}
.canvas-wrap canvas {
    display: block;
    max-width: 100%;
    cursor: crosshair;
}
.sidebar {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem;
}
.sidebar h3 {
    margin: 1rem 0 0.4rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    color: var(--muted);
    letter-spacing: 0.05em;
}
.sidebar h3:first-child { margin-top: 0; }
#boxList {
    padding: 0;
    list-style: none;
    max-height: 200px;
    overflow-y: auto;
}
#boxList li {
    padding: 0.4rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    margin: 0.3rem 0;
    font-size: 0.85em;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
#boxList li:hover { background: var(--bg); }
#boxList .del { color: #f55; cursor: pointer; }
.hint { color: var(--muted); font-size: 0.85em; margin: 0.4rem 0; }