:root {
  --bg: #0f1216; --bg-elev: #171b21; --bg-panel: #1c2129; --border: #2a313b;
  --text: #e8ecf1; --text-dim: #9aa4b2; --accent: #ff7a1a; --accent-2: #ffb46b;
  --ok: #4cd08a; --warn: #f5c451; --err: #ff5c5c; --lock: #6fb1ff; --carbon: #23272d;
  --radius: 10px; --font: "Noto Sans JP", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
:root[data-theme="light"] {
  --bg: #f4f6f8; --bg-elev: #ffffff; --bg-panel: #ffffff; --border: #d9dee5; --text: #172029; --text-dim: #5d6b7a; --carbon: #e6e9ee;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: var(--font); font-size: 15px; line-height: 1.6; }
a { color: var(--accent-2); text-decoration: none; } a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.3; margin: 0 0 .5em; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.topbar { display: flex; align-items: center; gap: 14px; padding: 10px 16px; background: var(--bg-elev); border-bottom: 1px solid var(--border); }
.topbar .brand { font-weight: 800; letter-spacing: .02em; font-size: 1.05rem; color: var(--text); }
.topbar .brand span { color: var(--accent); }
.topbar .spacer { flex: 1; }
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg-panel); color: var(--text); cursor: pointer; font: inherit; font-size: .92rem; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: linear-gradient(100deg, var(--accent), #ff9a3d); color: #fff; border: none; font-weight: 700; }
.btn.primary:disabled { opacity: .45; cursor: not-allowed; }
.btn.danger { border-color: var(--err); color: var(--err); }
.btn.sm { padding: 4px 9px; font-size: .82rem; }
.btn.on { background: var(--accent); color: #fff; border-color: transparent; }
.card { background: var(--bg-panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.muted { color: var(--text-dim); }
.small { font-size: .85rem; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
input[type=text], input[type=number], input[type=email], input[type=tel], input[type=password], select, textarea {
  font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 6px 8px; width: 100%;
}
input[type=number] { width: 88px; }
label.f { display: block; font-size: .82rem; color: var(--text-dim); margin-bottom: 8px; }
label.f > span { display: block; margin-bottom: 3px; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: .75rem; font-weight: 700; }
.badge.lock { background: rgba(111,177,255,.15); color: var(--lock); }
.badge.free { background: rgba(255,92,92,.15); color: var(--err); }
.badge.ok { background: rgba(76,208,138,.15); color: var(--ok); }
.badge.warn { background: rgba(245,196,81,.15); color: var(--warn); }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--border); font-size: .9rem; }
th { color: var(--text-dim); font-weight: 600; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: #000c; color: #fff; padding: 10px 16px; border-radius: 8px; font-size: .9rem; z-index: 50; pointer-events: none; opacity: 0; transition: opacity .2s; }
.toast.show { opacity: 1; }
.modal-bg { position: fixed; inset: 0; background: #0009; display: none; align-items: center; justify-content: center; z-index: 40; padding: 16px; }
.modal-bg.show { display: flex; }
.modal { background: var(--bg-panel); border: 1px solid var(--border); border-radius: 12px; padding: 20px; width: min(560px, 100%); max-height: 92vh; overflow: auto; }

/* ---- LP ---- */
.hero { padding: 48px 0 24px; }
.hero h1 { font-size: 2rem; }
.hero p.lead { font-size: 1.05rem; color: var(--text-dim); max-width: 640px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.tpl { display: block; color: var(--text); }
.tpl:hover { border-color: var(--accent); text-decoration: none; }
.tpl .thumb { height: 120px; background: var(--carbon); border-radius: 8px; margin-bottom: 10px; display: flex; align-items: center; justify-content: center; color: var(--text-dim); overflow: hidden; }
.tpl .thumb svg { width: 100%; height: 100%; }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin: 20px 0; }
.steps .card b { display: block; color: var(--accent-2); margin-bottom: 4px; }
footer { padding: 30px 0; color: var(--text-dim); font-size: .85rem; border-top: 1px solid var(--border); margin-top: 40px; }

/* ---- Editor ---- */
.ed { display: grid; grid-template-columns: 56px 1fr 320px; height: calc(100dvh - 53px); }
.ed .tools { background: var(--bg-elev); border-right: 1px solid var(--border); display: flex; flex-direction: column; gap: 4px; padding: 8px 6px; }
.ed .tools button { width: 44px; height: 44px; border-radius: 8px; border: 1px solid transparent; background: transparent; color: var(--text-dim); cursor: pointer; font-size: 1.15rem; display: flex; align-items: center; justify-content: center; }
.ed .tools button:hover { background: var(--bg-panel); color: var(--text); }
.ed .tools button.on { background: var(--accent); color: #fff; }
.ed .tools .sep { height: 1px; background: var(--border); margin: 4px 0; }
.ed .canvas { position: relative; overflow: hidden; background: #0b0d10; touch-action: none; }
:root[data-theme="light"] .ed .canvas { background: #e9edf2; }
.ed .canvas svg { width: 100%; height: 100%; display: block; cursor: crosshair; user-select: none; }
.ed .canvas .status { position: absolute; left: 10px; bottom: 8px; font-size: .78rem; color: var(--text-dim); background: #0008; padding: 3px 8px; border-radius: 6px; font-variant-numeric: tabular-nums; }
.ed .canvas .hint { position: absolute; left: 10px; top: 8px; font-size: .82rem; color: var(--text); background: #000a; padding: 5px 10px; border-radius: 6px; max-width: 70%; }
.ed .side { background: var(--bg-elev); border-left: 1px solid var(--border); overflow: auto; padding: 12px; display: flex; flex-direction: column; gap: 12px; }
.ed .side section { border: 1px solid var(--border); border-radius: 8px; padding: 10px; }
.ed .side section h3 { font-size: .85rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 8px; }
.issues { list-style: none; margin: 0; padding: 0; font-size: .85rem; }
.issues li { padding: 4px 6px; border-radius: 6px; margin-bottom: 4px; cursor: pointer; }
.issues li.error { background: rgba(255,92,92,.12); color: #ffb3b3; }
.issues li.warn { background: rgba(245,196,81,.12); color: #ffe2a3; }
.quote-table td { padding: 3px 4px; font-size: .85rem; border: none; }
.quote-total { font-size: 1.5rem; font-weight: 800; color: var(--accent-2); text-align: right; }
.prop-grid { display: grid; grid-template-columns: auto 1fr; gap: 6px 8px; align-items: center; font-size: .85rem; }
.prop-grid input[type=number] { width: 100%; }
.vlist { max-height: 180px; overflow: auto; font-size: .8rem; }
.vlist .v { display: grid; grid-template-columns: 22px 1fr 1fr 1fr 26px; gap: 4px; align-items: center; margin-bottom: 3px; }
.vlist .v input { padding: 2px 4px; font-size: .78rem; width: 100%; }
.vlist .v.sel { background: rgba(255,122,26,.15); border-radius: 4px; }
.mode-box { padding: 8px; border-radius: 8px; font-size: .85rem; }
.mode-box.lock { background: rgba(111,177,255,.1); border: 1px solid rgba(111,177,255,.35); }
.mode-box.free { background: rgba(255,92,92,.08); border: 1px solid rgba(255,92,92,.35); }

/* SVG */
.g-grid line { stroke: #ffffff10; } .g-grid line.major { stroke: #ffffff22; }
:root[data-theme="light"] .g-grid line { stroke: #00000010; } :root[data-theme="light"] .g-grid line.major { stroke: #00000022; }
.plate { fill: #2b3139; stroke: #cfd6de; stroke-width: 1.2; vector-effect: non-scaling-stroke; }
:root[data-theme="light"] .plate { fill: #cdd3da; stroke: #40505f; }
.feat { fill: #0b0d10; stroke: #9ad0ff; stroke-width: 1.2; vector-effect: non-scaling-stroke; cursor: move; }
:root[data-theme="light"] .feat { fill: #e9edf2; }
.feat.csk { stroke: #ff8a8a; }
.feat.locked { stroke: var(--lock); stroke-dasharray: 3 2; cursor: not-allowed; }
.feat.sel { stroke: var(--accent); stroke-width: 2.2; }
.feat.bad { stroke: var(--err); stroke-width: 2.2; }
.handle { fill: #fff; stroke: var(--accent); stroke-width: 1.5; vector-effect: non-scaling-stroke; cursor: pointer; }
.handle.sel { fill: var(--accent); }
.edge-hit { stroke: transparent; stroke-width: 10; vector-effect: non-scaling-stroke; fill: none; cursor: copy; }
.axis { stroke: var(--accent); stroke-dasharray: 6 4; stroke-width: 1; vector-effect: non-scaling-stroke; opacity: .5; }
.csk-ring { fill: none; stroke: #ff8a8a; stroke-width: .6; vector-effect: non-scaling-stroke; pointer-events: none; opacity: .7; }
.dim { font-size: 11px; fill: var(--text-dim); pointer-events: none; }

@media (max-width: 900px) {
  .ed { grid-template-columns: 48px 1fr; grid-template-rows: 1fr auto; height: auto; min-height: calc(100dvh - 53px); }
  .ed .canvas { min-height: 52vh; }
  .ed .side { grid-column: 1 / -1; border-left: none; border-top: 1px solid var(--border); }
  .ed .tools button { width: 38px; height: 38px; font-size: 1rem; }
}
@media (prefers-color-scheme: light) { :root:not([data-theme="dark"]) { --bg: #f4f6f8; --bg-elev: #ffffff; --bg-panel: #ffffff; --border: #d9dee5; --text: #172029; --text-dim: #5d6b7a; --carbon: #e6e9ee; } }