:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --ink: #1a1d21;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #3d4ed8;
  --accent-ink: #fff;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(16,24,40,.08), 0 1px 2px rgba(16,24,40,.06);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; } /* beat .editor{display:grid} etc. */
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo,
    "Noto Sans JP", "Segoe UI", Roboto, sans-serif;
  color: var(--ink); background: var(--bg); line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
.muted { color: var(--muted); }

.site-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; background: var(--panel); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.brand-name { font-weight: 700; font-size: 20px; letter-spacing: .02em; }
.brand-tag { color: var(--muted); font-size: 14px; }

main { max-width: 1200px; margin: 0 auto; padding: 20px; }

/* dropzone */
.dropzone {
  border: 2px dashed #c4cad4; border-radius: var(--radius); background: var(--panel);
  padding: 56px 24px; text-align: center; cursor: pointer; transition: border-color .15s, background .15s;
  color: var(--muted);
}
.dropzone:hover, .dropzone:focus, .dropzone.drag { border-color: var(--accent); background: #fafbff; outline: none; }
.drop-inner { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.drop-hint { font-size: 17px; color: var(--ink); margin: 6px 0 0; }
.drop-sub { font-size: 13px; margin: 0; }

/* editor layout */
.editor { display: grid; grid-template-columns: 1fr 340px; gap: 20px; align-items: start; }
@media (max-width: 860px) { .editor { grid-template-columns: 1fr; } }

.canvas-wrap { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; box-shadow: var(--shadow); position: relative; }
#canvas { display: block; max-width: 100%; margin: 0 auto; border-radius: 6px; touch-action: none; cursor: crosshair; background: #eef0f3; }
.manual-hint { font-size: 12px; margin: 10px 2px 2px; }

.status {
  position: absolute; top: 18px; left: 18px; z-index: 2;
  background: rgba(31,36,48,.92); color: #fff; font-size: 13px; padding: 6px 12px;
  border-radius: 999px; display: none;
}
.status.show { display: inline-block; }

/* side panel */
.panel { display: flex; flex-direction: column; gap: 16px; }
.panel-block { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow); }
.panel-block h2 { font-size: 16px; margin: 0 0 10px; }
.panel-block h3 { font-size: 14px; margin: 0 0 8px; }

.det-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; max-height: 320px; overflow: auto; }
.det-item { display: grid; grid-template-columns: 10px 1fr auto; gap: 10px; align-items: center; padding: 8px; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.det-item.selected { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(61,78,216,.15); }
.det-item.off { opacity: .5; }
.det-swatch { width: 10px; height: 28px; border-radius: 3px; }
.det-main { min-width: 0; }
.det-class { font-size: 12px; color: var(--muted); }
.det-text { font-size: 13px; font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.det-controls { display: flex; gap: 6px; }
.icon-btn { border: 1px solid var(--line); background: #fff; border-radius: 6px; font-size: 12px; padding: 3px 8px; cursor: pointer; color: var(--ink); }
.icon-btn:hover { background: #f1f2f4; }

.style-sel { display: flex; gap: 8px; }
.style-btn { flex: 1; border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 8px; cursor: pointer; font-size: 13px; color: var(--ink); }
.style-btn.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

.face-toggle { display: flex; align-items: center; gap: 8px; font-size: 13px; cursor: pointer; }
.face-toggle.soon { color: var(--muted); }

.verify-notice {
  background: #fff8e1; border: 1px solid #ffe08a; color: #7a5900;
  border-radius: 8px; padding: 10px 12px; font-size: 13px; margin: 0 0 12px; font-weight: 600;
}
.actions { display: flex; flex-direction: column; gap: 8px; }
.primary-btn { background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 8px; padding: 11px; font-size: 15px; font-weight: 600; cursor: pointer; }
.primary-btn:hover { filter: brightness(1.05); }
.ghost-btn { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 9px 12px; font-size: 14px; cursor: pointer; color: var(--ink); }
.ghost-btn:hover { background: #f1f2f4; }

/* how it works */
.how { margin-top: 22px; }
.how details { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 4px 16px; box-shadow: var(--shadow); }
.how summary { cursor: pointer; font-weight: 600; padding: 12px 0; }
.how-body h3 { font-size: 14px; margin: 16px 0 6px; }
.how-body ul { margin: 0 0 8px; padding-left: 20px; }
.how-body li { margin: 4px 0; }
.how-body p { margin: 4px 0; }
#stressNote:empty { display: none; }