:root{--surface-000:#ffffff;--surface-100:#fff8f2;--surface-200:#ffeadf;--night:#111111;--on-night:#ffffff;--ink:#1a1513;--ink-muted:#6b5d55;--line:#ead9cf;--coral-400:#ff896e;--action:#b8431f;--on-action:#ffffff;--gold-400:#b5a278;--gold-700:#7a6a43;--on-gold:#ffffff;--leaf:#2f6b4a;--alert:#b3261e;--focus:#1a1513;--shadow-card:0 8px 24px rgba(184, 67, 31, 0.10);}@media (prefers-color-scheme: dark){:root{--surface-000:#1f1a17;--surface-100:#171311;--surface-200:#2a201c;--night:#0b0908;--on-night:#f6eee8;--ink:#f6eee8;--ink-muted:#b9aaa0;--line:#3a302b;--coral-400:#ff896e;--action:#ff9a80;--on-action:#1a1513;--gold-400:#b5a278;--gold-700:#d6c497;--on-gold:#1a1513;--leaf:#6fbf8e;--alert:#ff8a80;--focus:#f6eee8;--shadow-card:0 8px 24px rgba(0, 0, 0, 0.40);}}:root{--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-6:24px;--space-8:32px;--space-12:48px;--space-24:96px;--radius-sm:6px;--radius-md:16px;--radius-lg:32px;--radius-pill:999px;--font-sans:"Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;--font-label:"Roboto Condensed", "Arial Narrow", sans-serif;--font-slab:"Roboto Slab", Georgia, serif;}

body { margin: 0; background: var(--surface-100); color: var(--ink); font-family: var(--font-sans); font-size: 16px; line-height: 1.9; }
.nk-pad { padding: var(--space-6); }
.nk-row { display: flex; flex-wrap: wrap; gap: var(--space-4); align-items: center; }
.nk-grid { display: grid; gap: var(--space-6); grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* Button */
.nk-btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); border: 2px solid transparent; border-radius: var(--radius-pill); font-family: var(--font-sans); font-weight: 700; line-height: 1.4; cursor: pointer; text-decoration: none; transition: transform .15s ease, box-shadow .15s ease; }
.nk-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-card); }
.nk-btn:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.nk-btn-md { padding: var(--space-3) var(--space-6); font-size: 15px; }
.nk-btn-lg { padding: var(--space-4) var(--space-8); font-size: 18px; }
.nk-btn-primary { background: var(--action); color: var(--on-action); }
.nk-btn-member { background: var(--gold-700); color: var(--on-gold); }
.nk-btn-secondary { background: transparent; color: var(--action); border-color: var(--action); }
.nk-btn-ghost { background: transparent; color: var(--ink); padding-left: 0; padding-right: 0; }
.nk-btn-ghost::after { content: "→"; color: var(--action); }
.nk-btn[disabled] { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }

/* SectionHeading */
.nk-sh { display: flex; flex-direction: column; gap: var(--space-2); }
.nk-sh-center { align-items: center; text-align: center; }
.nk-sh-label { font-family: var(--font-label); font-weight: 700; font-size: 14px; letter-spacing: .16em; text-transform: uppercase; color: var(--action); display: flex; gap: var(--space-2); align-items: baseline; }
.nk-sh-num { color: var(--ink-muted); letter-spacing: .08em; font-size: 13px; }
.nk-sh-title { margin: 0; font-size: 30px; line-height: 1.5; font-weight: 700; color: var(--ink); }
.nk-sh-lead { margin: var(--space-2) 0 0; font-size: 16px; line-height: 1.9; color: var(--ink-muted); max-width: 40em; }

/* PlanCard */
.nk-plan { position: relative; display: flex; flex-direction: column; gap: var(--space-4); background: var(--surface-000); border: 2px solid var(--line); border-radius: var(--radius-md); padding: var(--space-8) var(--space-6) var(--space-6); }
.nk-plan-featured { border-color: var(--coral-400); box-shadow: var(--shadow-card); }
.nk-plan-badge { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--coral-400); color: #1a1513; font-size: 12px; font-weight: 700; padding: 2px var(--space-4); border-radius: var(--radius-pill); white-space: nowrap; }
.nk-plan-name { margin: 0; font-size: 20px; font-weight: 700; text-align: center; }
.nk-plan-price { text-align: center; font-family: var(--font-slab); font-weight: 700; font-size: 40px; line-height: 1.1; color: var(--ink); }
.nk-plan-price small { font-family: var(--font-sans); font-size: 14px; font-weight: 500; color: var(--ink-muted); margin-left: var(--space-1); }
.nk-plan-impact { margin: 0; text-align: center; background: var(--surface-200); border-radius: var(--radius-sm); padding: var(--space-2) var(--space-3); font-size: 14px; line-height: 1.7; }
.nk-plan ul { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: var(--space-2); font-size: 14px; line-height: 1.7; }
.nk-plan li { display: flex; gap: var(--space-2); }
.nk-plan li::before { content: "●"; color: var(--coral-400); font-size: 10px; line-height: 2.4; }
.nk-plan .nk-btn { margin-top: auto; width: 100%; box-sizing: border-box; }


/* CatCard */
.nk-cat { background: var(--surface-000); border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--line); display: flex; flex-direction: column; }
.nk-cat-photo { aspect-ratio: 4 / 3; background: var(--surface-200); display: grid; place-items: center; position: relative; }
.nk-cat-photo img { width: 100%; height: 100%; object-fit: cover; }
.nk-cat-photo-ph { width: 72px; height: 72px; border-radius: 50%; background: var(--coral-400); display: grid; place-items: center; font-family: var(--font-label); font-weight: 700; font-size: 24px; color: #1a1513; }
.nk-cat-body { padding: var(--space-4) var(--space-4) var(--space-6); display: flex; flex-direction: column; gap: var(--space-2); }
.nk-cat-name { margin: 0; font-size: 20px; font-weight: 700; line-height: 1.4; }
.nk-cat-meta { margin: 0; font-size: 13px; color: var(--ink-muted); }
.nk-tags { display: flex; flex-wrap: wrap; gap: var(--space-1); }
.nk-tag { font-size: 12px; line-height: 1.6; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0 var(--space-2); color: var(--ink); background: var(--surface-100); }

/* ProductCard */
.nk-prod { display: flex; flex-direction: column; gap: var(--space-2); }
.nk-prod-img { aspect-ratio: 1; border-radius: var(--radius-md); background: var(--surface-200); overflow: hidden; position: relative; }
.nk-prod-img img { width: 100%; height: 100%; object-fit: cover; }
.nk-prod-tag { position: absolute; top: var(--space-2); right: var(--space-2); background: var(--gold-400); color: #1a1513; font-size: 11px; font-weight: 700; padding: 0 var(--space-2); border-radius: var(--radius-pill); }
.nk-prod-name { margin: 0; font-size: 15px; font-weight: 700; line-height: 1.6; }
.nk-prod-price { font-family: var(--font-slab); font-weight: 700; font-size: 18px; }
.nk-prod-price small { font-family: var(--font-sans); font-size: 12px; color: var(--ink-muted); font-weight: 400; margin-left: var(--space-1); }
.nk-prod-note { margin: 0; font-size: 12px; color: var(--action); font-weight: 700; }

/* NewsList */
.nk-news { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.nk-news li { border-bottom: 1px solid var(--line); }
.nk-news a { display: grid; grid-template-columns: 96px 88px 1fr; gap: var(--space-4); align-items: baseline; padding: var(--space-4) 0; color: var(--ink); text-decoration: none; }
.nk-news a:hover .nk-news-title { color: var(--action); }
.nk-news-date { font-family: var(--font-label); font-size: 14px; color: var(--ink-muted); letter-spacing: .04em; }
.nk-news-cat { font-size: 12px; font-weight: 700; color: var(--action); border: 1px solid var(--action); border-radius: var(--radius-pill); text-align: center; padding: 0 var(--space-2); }
.nk-news-title { font-size: 15px; line-height: 1.7; }
@media (max-width: 560px) { .nk-news a { grid-template-columns: auto auto; } .nk-news-title { grid-column: 1 / -1; } }

/* ActivityCard */
.nk-act { display: flex; flex-direction: column; gap: var(--space-4); }
.nk-act-img { aspect-ratio: 3 / 2; border-radius: var(--radius-md); background: var(--surface-200); overflow: hidden; display: grid; place-items: center; color: var(--ink-muted); font-size: 13px; }
.nk-act-img img { width: 100%; height: 100%; object-fit: cover; }
.nk-act-plain { background: var(--surface-000); border-radius: var(--radius-md); padding: var(--space-6); border: 1px solid var(--line); }
.nk-act-body { display: flex; flex-direction: column; gap: var(--space-2); }
.nk-act-num { font-family: var(--font-label); font-weight: 700; font-size: 13px; letter-spacing: .08em; color: var(--action); }
.nk-act-title { margin: 0; font-size: 20px; line-height: 1.6; font-weight: 700; }
.nk-act-text { margin: 0; font-size: 15px; line-height: 1.9; color: var(--ink-muted); }


/* StatHighlight */
.nk-stat { margin: 0; display: flex; flex-direction: column; gap: var(--space-2); padding: var(--space-6); background: var(--surface-000); border-radius: var(--radius-md); border: 1px solid var(--line); }
.nk-stat-accent { border-color: var(--coral-400); }
.nk-stat-value { font-family: var(--font-slab); font-weight: 700; font-size: 56px; line-height: 1; color: var(--ink); }
.nk-stat-accent .nk-stat-value { color: var(--action); }
.nk-stat-unit { font-family: var(--font-sans); font-size: 18px; font-weight: 700; margin-left: var(--space-1); }
.nk-stat-label { font-size: 15px; line-height: 1.8; font-weight: 500; }
.nk-stat-source { margin: 0; font-size: 12px; color: var(--ink-muted); }
.nk-stat-source a { color: var(--ink-muted); }

/* StepFlow */
.nk-step { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--space-4); }
.nk-step-item { position: relative; display: flex; flex-direction: column; gap: var(--space-2); padding: var(--space-6) var(--space-4); background: var(--surface-000); border-radius: var(--radius-md); border: 1px solid var(--line); }
.nk-step-item:not(:last-child)::after { content: "→"; position: absolute; right: -14px; top: 50%; transform: translateY(-50%); color: var(--coral-400); font-weight: 700; z-index: 1; }
.nk-step-num { min-width: 40px; height: 40px; padding: 0 var(--space-2); box-sizing: border-box; border-radius: var(--radius-pill); background: var(--coral-400); color: #1a1513; display: inline-grid; place-items: center; justify-self: start; align-self: flex-start; font-family: var(--font-label); font-weight: 700; font-size: 15px; }
.nk-step-title { font-size: 16px; line-height: 1.6; }
.nk-step-text { font-size: 13px; line-height: 1.8; color: var(--ink-muted); }
.nk-prod-pre { margin: 0 var(--space-1) 0 0 !important; }

/* FeatureBand */
.nk-band { display: grid; grid-template-columns: 1.1fr 1fr; gap: var(--space-12); align-items: center; background: var(--night); color: var(--on-night); border-radius: var(--radius-lg); padding: var(--space-12); }
.nk-band-main { display: flex; flex-direction: column; gap: var(--space-4); }
.nk-band-label { font-family: var(--font-label); font-weight: 700; font-size: 14px; letter-spacing: .16em; text-transform: uppercase; color: var(--coral-400); }
.nk-band-title { margin: 0; font-size: 32px; line-height: 1.5; font-weight: 900; }
.nk-band-text { margin: 0; font-size: 16px; line-height: 2; opacity: .88; }
.nk-band .nk-btn-secondary { color: var(--on-night); border-color: var(--on-night); }
.nk-band .nk-btn-ghost { color: var(--on-night); }
.nk-band-points { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--space-3); }
.nk-band-points li { display: flex; flex-direction: column; gap: var(--space-1); padding: var(--space-4) var(--space-6); border-radius: var(--radius-md); border: 1px solid rgba(255,255,255,.18); }
.nk-band-points b { font-size: 16px; color: var(--coral-400); }
.nk-band-points span { font-size: 14px; line-height: 1.8; opacity: .88; }
@media (max-width: 760px) { .nk-band { grid-template-columns: 1fr; padding: var(--space-8) var(--space-6); } }

/* ExpansionRoadmap */
.nk-road { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--space-6); position: relative; }
.nk-road-stage { position: relative; display: flex; flex-direction: column; gap: var(--space-2); }
.nk-road-mark { height: 116px; display: flex; align-items: flex-end; position: relative; }
.nk-road-stage:not(:last-child) .nk-road-mark::after { content: ""; position: absolute; left: 0; right: calc(-1 * var(--space-6)); bottom: 0; border-bottom: 2px dashed var(--coral-400); z-index: 0; }
.nk-road-circle { position: relative; z-index: 1; display: grid; place-items: center; border-radius: 50%; background: var(--surface-000); border: 2px solid var(--coral-400); color: var(--ink); font-weight: 900; font-size: 15px; margin-bottom: -2px; }
.nk-road-current .nk-road-circle { background: var(--coral-400); color: #1a1513; }
.nk-road-step { margin-top: var(--space-3); font-family: var(--font-label); font-weight: 700; font-size: 13px; letter-spacing: .08em; color: var(--action); display: flex; gap: var(--space-2); align-items: center; }
.nk-road-step b { font-family: var(--font-sans); font-size: 11px; background: var(--action); color: var(--on-action); border-radius: var(--radius-pill); padding: 0 var(--space-2); letter-spacing: 0; }
.nk-road-title { font-size: 17px; line-height: 1.6; }
.nk-road-text { font-size: 14px; line-height: 1.9; color: var(--ink-muted); }

/* 仮置き(LP公開時は表示しない)の囲み — デザインシステム内のプレビュー専用 */
.nk-draft { position: relative; border: 2px dashed var(--line); border-radius: var(--radius-md); padding: var(--space-8) var(--space-6) var(--space-6); }
.nk-draft::before { content: "仮置き:LP公開時は表示しない"; position: absolute; top: -12px; left: var(--space-4); background: var(--surface-100); color: var(--ink-muted); font-size: 12px; font-weight: 700; padding: 0 var(--space-2); }