/* scheme.chromoshub.ru — GC gas-scheme editor */
:root {
    --bg: #0d1117;
    --bg-2: #161b22;
    --bg-3: #1c2430;
    --card: #10151d;
    --line: #26303c;
    --line-2: #313d4d;
    --txt: #e6edf3;
    --txt-2: #9aa7b4;
    --txt-3: #6b7684;
    --accent: #4bd0b0;
    --accent-2: #16a085;
    --err: #f85149;
    --mono: "JetBrains Mono", "Cascadia Code", "Fira Code", "DejaVu Sans Mono", "Consolas", monospace;
    --ui: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
:root[data-theme="light"] {
    --bg: #f2f6f5;
    --bg-2: #ffffff;
    --bg-3: #eef2f4;
    --card: #ffffff;
    --line: #dde4e6;
    --line-2: #c9d3d4;
    --txt: #14201d;
    --txt-2: #52616a;
    --txt-3: #808d92;
    --accent: #0f9b81;
    --accent-2: #0c7d68;
    --err: #cf222e;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
    font-family: var(--ui);
    background: var(--bg);
    color: var(--txt);
    display: flex; flex-direction: column;
    overflow: hidden;
}

.topbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 18px; border-bottom: 1px solid var(--line); background: var(--bg-2);
    flex: 0 0 auto;
}
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 600; font-size: 15px; }
.brand__mark { font-size: 18px; }
.actions { display: flex; align-items: center; gap: 10px; }
.lang { display: inline-flex; height: 32px; border: 1px solid var(--line-2); border-radius: 8px; overflow: hidden; }
.lang__btn {
    font-family: var(--mono); font-size: 11px; font-weight: 600;
    padding: 0 9px; border: 0; background: var(--bg-3); color: var(--txt-2); cursor: pointer;
    transition: background .12s, color .12s;
}
.lang__btn + .lang__btn { border-left: 1px solid var(--line-2); }
.lang__btn:hover { color: var(--accent); }
.lang__btn.is-active { background: var(--accent-2); color: #fff; }
.icon-btn {
    width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center;
    border: 1px solid var(--line-2); border-radius: 8px; background: var(--bg-3); color: var(--txt-2); cursor: pointer;
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); }
.icon-btn svg { width: 17px; height: 17px; }
.icon-btn .i-moon { display: none; }
:root[data-theme="light"] .icon-btn .i-sun { display: none; }
:root[data-theme="light"] .icon-btn .i-moon { display: block; }

/* toolbar */
.toolbar {
    display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
    padding: 7px 12px; border-bottom: 1px solid var(--line); background: var(--bg-2);
    flex: 0 0 auto;
}
.tb-btn {
    font-family: var(--ui); font-size: 12.5px; padding: 6px 10px;
    border: 1px solid var(--line-2); border-radius: 8px;
    background: var(--bg-3); color: var(--txt-2); cursor: pointer;
    transition: background .12s, color .12s;
}
.tb-btn:hover { color: var(--accent); border-color: var(--accent); }
.tb-btn:disabled { opacity: .4; pointer-events: none; }
.tb-sep { width: 1px; height: 20px; background: var(--line-2); margin: 0 4px; }
.tb-zoom { font-family: var(--mono); font-size: 11.5px; color: var(--txt-3); min-width: 42px; text-align: center; }
.tb-title {
    flex: 1; min-width: 120px; font-family: var(--ui); font-size: 13px;
    padding: 6px 10px; background: var(--bg-3); color: var(--txt);
    border: 1px solid var(--line-2); border-radius: 8px; outline: none;
}
.tb-title:focus { border-color: var(--accent); }
.toolbar select {
    font-family: var(--mono); font-size: 12px; padding: 5px 6px;
    background: var(--bg-3); color: var(--txt); border: 1px solid var(--line-2);
    border-radius: 8px; outline: none; cursor: pointer;
}

/* editor layout */
.editor { flex: 1; min-height: 0; display: grid; grid-template-columns: 196px 1fr 250px; }

/* palette */
.palette {
    overflow-y: auto; border-right: 1px solid var(--line); background: var(--bg-2);
    padding: 10px; display: grid; grid-template-columns: 1fr 1fr; gap: 7px; align-content: start;
}
.pal-item {
    display: flex; flex-direction: column; align-items: center; gap: 3px;
    padding: 6px 2px 5px; border: 1px solid var(--line); border-radius: 9px;
    background: var(--bg-3); cursor: pointer; transition: border-color .12s;
}
.pal-item:hover { border-color: var(--accent); }
.pal-item.is-active { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.pal-item svg { background: #fff; border-radius: 5px; width: 62px; height: 40px; display: block; color-scheme: only light; }
.pal-item span { font-size: 10.5px; color: var(--txt-2); text-align: center; line-height: 1.2; }

/* canvas — always a white "paper" with black ink, opt out of browser auto-darkening */
.canvas-wrap { position: relative; overflow: hidden; background: #fff; min-width: 0; color-scheme: only light; }
#canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; }
/* overlay is purely decorative (preview line, selection rects, ghost, rubber-band);
   it must never intercept clicks aimed at ports/nodes underneath it */
#lyOverlay { pointer-events: none; }
#canvas .node { cursor: move; }
/* pointer-events:all — a transparent fill is otherwise NOT hit-tested over the
   opaque symbol body beneath it, so ports overlapping their element became
   unclickable; this makes the whole port radius grab reliably */
#canvas .port { fill: transparent; stroke: none; cursor: crosshair; pointer-events: all; }
#canvas .node:hover .port, #canvas.connecting .port { fill: rgba(22,160,133,.35); }
#canvas .port:hover { fill: rgba(22,160,133,.85); }
#canvas .wire-hit { cursor: pointer; }
#canvas.connecting, #canvas.placing { cursor: crosshair; }
#canvas.panning { cursor: grabbing; }
.inline-edit {
    position: absolute; z-index: 5; min-width: 140px; max-width: 260px;
    font-family: var(--ui); font-size: 13px; padding: 4px 7px; resize: none;
    background: #fff; color: #111; border: 1.5px solid var(--accent-2); border-radius: 6px;
    outline: none; box-shadow: 0 4px 16px rgba(0,0,0,.25);
}

/* props */
.props { overflow-y: auto; border-left: 1px solid var(--line); background: var(--bg-2); padding: 14px; font-size: 13px; }
.props h3 { font-size: 12px; text-transform: uppercase; letter-spacing: .07em; color: var(--txt-2); margin-bottom: 12px; }
.props .field { display: flex; flex-direction: column; gap: 6px; color: var(--txt-2); margin-bottom: 12px; }
.props textarea, .props input[type="text"], .props select {
    font-family: var(--ui); font-size: 13px; padding: 7px 9px; resize: vertical;
    background: var(--bg-3); color: var(--txt); border: 1px solid var(--line-2); border-radius: 8px; outline: none;
    max-width: 100%;
}
.props textarea:focus, .props input:focus, .props select:focus { border-color: var(--accent); }
.props select { cursor: pointer; }
.seg { display: inline-flex; border: 1px solid var(--line-2); border-radius: 9px; overflow: hidden; width: 100%; }
.seg__btn {
    flex: 1; font-family: var(--ui); font-size: 12.5px;
    padding: 7px 6px; border: 0; background: var(--bg-3); color: var(--txt-2); cursor: pointer;
    transition: background .12s, color .12s;
}
.seg__btn + .seg__btn { border-left: 1px solid var(--line-2); }
.seg__btn:hover { color: var(--accent); }
.seg__btn.is-active { background: var(--accent-2); color: #fff; }
.swatches { display: flex; gap: 6px; }
.swatch { flex: 1; height: 24px; border: 2px solid transparent; border-radius: 6px; cursor: pointer; padding: 0; }
.swatch.is-active { border-color: var(--txt); box-shadow: 0 0 0 2px var(--bg-2), 0 0 0 3px var(--txt); }
.props .btn-row { display: flex; gap: 7px; margin-bottom: 12px; }
.props .btn-row .tb-btn { flex: 1; }
.tb-btn--danger:hover { color: var(--err); border-color: var(--err); }
.props .hint { font-size: 12px; color: var(--txt-3); line-height: 1.65; }
.props .hint b { color: var(--txt-2); font-family: var(--mono); font-weight: 600; font-size: 11px; }

@media (max-width: 900px) {
    .editor { grid-template-columns: 150px 1fr 200px; }
}