:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --text: #172033;
  --muted: #667085;
  --border: #d8e0e9;
  --primary: #1769aa;
  --primary-hover: #11578e;
  --primary-soft: #e7f2fb;
  --success: #147a43;
  --success-soft: #eaf8ef;
  --warning: #8a5a00;
  --warning-soft: #fff7dc;
  --danger: #b42318;
  --focus: rgba(23, 105, 170, 0.22);
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --radius: 16px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; min-width: 0; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif; line-height: 1.7; }
body.dark {
  --bg: #0f1721;
  --surface: #182431;
  --surface-soft: #121c27;
  --text: #f2f7fb;
  --muted: #acbac6;
  --border: #344554;
  --primary: #83c2f1;
  --primary-hover: #a3d2f5;
  --primary-soft: #1e3850;
  --success: #9fe0b8;
  --success-soft: #183426;
  --warning: #ffd37a;
  --warning-soft: #3b311c;
  --danger: #ffaaa2;
  --focus: rgba(131, 194, 241, 0.24);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}
button, select, input { font: inherit; }
button { cursor: pointer; }
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.header-inner, .page-shell, .site-footer { width: min(1220px, calc(100% - 32px)); margin: 0 auto; }
.header-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 24px; padding: 28px 0 24px; }
.eyebrow { margin: 0 0 4px; color: var(--primary); font-size: 0.86rem; font-weight: 800; }
h1, h2, h3, p, span, strong { overflow-wrap: anywhere; }
h1 { margin: 0; font-size: clamp(1.85rem, 4vw, 2.5rem); line-height: 1.25; }
.lead { max-width: 820px; margin: 10px 0 0; color: var(--muted); }
.page-shell { padding: 28px 0 56px; }
.tool-grid { display: grid; grid-template-columns: minmax(340px, 1.15fr) minmax(300px, 0.85fr); gap: 24px; align-items: start; }
.panel, .content-section { min-width: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.panel { padding: 22px; }
.result-panel { position: sticky; top: 16px; }
.panel-heading h2, .result-topbar h2, .content-section h2 { margin: 0; line-height: 1.35; }
.panel-heading p, .result-status { margin: 5px 0 0; color: var(--muted); font-size: 0.92rem; }
.input-label { display: block; margin: 16px 0 7px; font-weight: 800; }
select { width: 100%; min-height: 46px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface-soft); color: var(--text); padding: 9px 11px; outline: none; }
select:focus, button:focus-visible, input:focus-visible, summary:focus-visible { border-color: var(--primary); box-shadow: 0 0 0 3px var(--focus); outline: none; }
.field-error { min-height: 1.4em; margin: 7px 0 0; color: var(--danger); font-weight: 800; font-size: 0.88rem; }
.theme-toggle, .secondary-button, .ghost-button { min-height: 44px; border-radius: 10px; padding: 10px 16px; font-weight: 800; border: 1px solid transparent; }
.theme-toggle, .ghost-button { background: var(--surface-soft); color: var(--text); border-color: var(--border); }
.secondary-button { background: var(--primary-soft); color: var(--primary); border-color: var(--primary); }
.checklist-area { display: grid; gap: 16px; margin-top: 18px; }
.step-card { border: 1px solid var(--border); border-radius: 13px; overflow: hidden; }
.step-heading { display: flex; justify-content: space-between; gap: 10px; align-items: center; background: var(--surface-soft); border-bottom: 1px solid var(--border); padding: 12px 14px; }
.step-heading h3 { margin: 0; font-size: 1rem; }
.step-heading span { color: var(--muted); font-size: 0.8rem; font-weight: 800; }
.check-items { display: grid; }
.check-item { display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 9px; align-items: start; padding: 12px 14px; cursor: pointer; }
.check-item + .check-item { border-top: 1px solid var(--border); }
.check-item:hover { background: var(--surface-soft); }
.check-item input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--primary); }
.check-text strong { display: block; font-size: 0.94rem; }
.check-text span { display: block; margin-top: 2px; color: var(--muted); font-size: 0.8rem; }
.bottom-actions { margin-top: 16px; }
.result-topbar { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.progress-card { margin-top: 18px; border: 1px solid var(--border); border-radius: 13px; background: var(--surface-soft); padding: 15px; }
.progress-numbers { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.progress-numbers strong { font-size: 1.5rem; }
.progress-numbers span { color: var(--muted); font-size: 0.85rem; text-align: right; }
.progress-track { height: 10px; margin-top: 10px; border-radius: 999px; background: var(--border); overflow: hidden; }
.progress-bar { height: 100%; width: 0; background: var(--primary); transition: width 0.18s ease; }
.pending-section { margin-top: 18px; }
.pending-section h3 { margin: 0 0 9px; }
.pending-list { display: grid; gap: 8px; }
.pending-item { border: 1px solid var(--border); border-left: 4px solid var(--warning); border-radius: 9px; background: var(--warning-soft); padding: 9px 11px; font-size: 0.88rem; }
.empty-state { border: 1px dashed var(--border); border-radius: 10px; background: var(--surface-soft); color: var(--muted); padding: 22px 14px; text-align: center; }
.status-box { margin-top: 16px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface-soft); padding: 13px; font-weight: 800; }
.status-box.complete { background: var(--success-soft); color: var(--success); border-color: color-mix(in srgb, var(--success) 35%, var(--border)); }
.copy-status { min-height: 1.5em; margin: 9px 0 0; color: var(--success); font-size: 0.9rem; font-weight: 800; }
.copy-status.error { color: var(--danger); }
.important-note { margin-top: 18px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface-soft); padding: 14px; }
.important-note p { margin: 5px 0 0; color: var(--muted); font-size: 0.9rem; }
.compact-note { margin-top: 16px; }
.content-section { margin-top: 28px; padding: 26px; }
.content-section > p { margin: 10px 0 0; color: var(--muted); }
.info-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 22px; }
.info-grid article { border: 1px solid var(--border); border-radius: 12px; background: var(--surface-soft); padding: 16px; }
.info-grid h3 { margin: 0; font-size: 1rem; }
.info-grid p { margin: 7px 0 0; color: var(--muted); font-size: 0.93rem; }
.faq-section details { border-top: 1px solid var(--border); padding: 14px 0; }
.faq-section details:first-of-type { margin-top: 16px; }
.faq-section summary { cursor: pointer; font-weight: 800; }
.faq-section details p { margin: 9px 0 0; color: var(--muted); }
.site-footer { padding: 0 0 28px; color: var(--muted); text-align: center; font-size: 0.86rem; }
@media (max-width: 940px) { .tool-grid { grid-template-columns: 1fr; } .result-panel { position: static; } }
@media (max-width: 700px) { .header-inner, .result-topbar { flex-direction: column; } .theme-toggle, .result-topbar button { width: 100%; } }
@media (max-width: 600px) { .header-inner, .page-shell, .site-footer { width: min(100% - 22px, 1220px); } .panel, .content-section { padding: 18px; } .tool-grid { display: flex; flex-direction: column; } .checklist-panel { order: 1; } .result-panel { order: 2; } .info-grid { grid-template-columns: 1fr; } .progress-numbers { flex-direction: column; gap: 2px; } .progress-numbers span { text-align: left; } }