/* ============================================================
   PROOF. Top Page CSS — 修正版
   ============================================================ */

/* NAV — トップページのみ透明スタート */
body.home nav {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom-color: transparent;
}
body.home nav.scrolled {
  background: var(--c-nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: var(--border);
}

/* ----------------------------------------------------------
   HERO
   ---------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 0 var(--pad-x) 80px;
  position: relative;
  overflow: hidden;
}

.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(232,255,0,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232,255,0,0.03) 1px, transparent 1px);
  background-size: 80px 80px;
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 40%, rgba(232,255,0,0.06) 0%, transparent 70%),
    radial-gradient(ellipse 50% 80% at 10% 80%, rgba(232,255,0,0.03) 0%, transparent 60%),
    linear-gradient(180deg, transparent 40%, rgba(10,10,10,0.95) 100%);
}

.hero-deco {
  position: absolute;
  top: 50%; left: -0.02em;
  transform: translateY(-56%);
  font-family: var(--font-display);
  font-size: clamp(180px, 22vw, 320px);
  letter-spacing: -0.06em;
  line-height: 0.85;
  color: transparent;
  -webkit-text-stroke: 1px rgba(244,244,240,0.04);
  pointer-events: none;
  user-select: none;
  z-index: 1;
  white-space: nowrap;
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: var(--sp-8);
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  font-weight: var(--weight-bold);
  opacity: 0;
  animation: fadeUp 0.8s 0.2s forwards;
}
.hero-eyebrow::before {
  content: '';
  width: 32px; height: 1px;
  background: var(--c-accent);
  flex-shrink: 0;
}

.hero-h1 {
  font-family: var(--font-display);
  font-size: clamp(56px, 10vw, 140px);
  letter-spacing: -0.05em;
  line-height: 1.1;
  margin-bottom: var(--sp-10);
  opacity: 0;
  animation: fadeUp 0.9s 0.4s forwards;
}
.hero-h1 .dot { color: var(--c-accent); }
.hero-h1 em { font-style: normal; color: var(--c-accent); }

.hero-sub {
  font-size: var(--text-hero-sub);
  line-height: var(--leading-loose);
  color: var(--c-mute);
  max-width: 60ch;
  margin-bottom: var(--sp-12); /* 修正: ボタンとの距離を増やす */
  font-weight: var(--weight-medium);
  opacity: 0;
  animation: fadeUp 0.9s 0.6s forwards;
}
.hero-sub strong { color: var(--c-ink); font-weight: var(--weight-medium); }

.hero-actions {
  display: flex;
  gap: var(--sp-4);
  align-items: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.9s 0.8s forwards;
}

.hero-scroll {
  position: absolute;
  right: var(--pad-x);
  bottom: 80px;
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--c-mute);
  writing-mode: vertical-rl;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  opacity: 0;
  animation: fadeIn 1s 1.2s forwards;
}
.hero-scroll::after {
  content: '';
  width: 1px; height: 48px;
  background: var(--c-mute);
}

@media (max-width: 719px) {
  .hero { padding: 0 var(--pad-x) 64px; }
  .hero-scroll { display: none; }
  .hero-deco { font-size: 120px; top: 30%; }
}

/* ----------------------------------------------------------
   HOW WE WORK — 3col variant
   ---------------------------------------------------------- */
.how-flow--3col {
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 960px) { .how-flow--3col { grid-template-columns: 1fr; } }
@media (min-width: 561px) and (max-width: 960px) { .how-flow--3col { grid-template-columns: repeat(3, 1fr); } }

.how-link {
  margin-top: var(--sp-10);
  text-align: right;
}
.how-link-btn {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--c-accent);
  font-weight: var(--weight-bold);
  transition: letter-spacing var(--ease);
}
.how-link-btn:hover { letter-spacing: 0.18em; }

/* ----------------------------------------------------------
   PLANS
   ---------------------------------------------------------- */
.plans {
  padding: 140px var(--pad-x);
  border-bottom: var(--border);
  background: #f4f4f0;
  color: var(--c-manifesto-text);
}
.plans-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.plans .section-label {
  color: #444;
}
.plans .section-label::before {
  background: #0a0a0a;
}
.plans .section-head h2 {
  color: var(--c-manifesto-text);
}
.plans .section-head p {
  color: var(--c-manifesto-mute);
}

.plans-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: var(--sp-16);
}
@media (max-width: 719px) { .plans-grid { grid-template-columns: 1fr; } }

.plan-card {
  background: #fff;
  border: 1px solid var(--c-manifesto-line);
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
  transition: border-color var(--ease);
}
.plan-card:hover { border-color: #0a0a0a; }
.plan-card--coming {
  opacity: 0.6;
  background: #f0f0ec;
}
.plan-card--coming:hover { border-color: var(--c-manifesto-line); }

@media (max-width: 719px) {
  .plan-card { padding: var(--sp-8) var(--sp-6); }
}

.plan-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  flex-wrap: wrap;
}
.plan-card-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: #444;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  font-weight: var(--weight-bold);
}
.plan-card-badge {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  font-weight: var(--weight-bold);
  padding: 3px 10px;
}
.plan-card-badge--monitor {
  background: #0a0a0a;
  color: #e8ff00;
}
.plan-card-badge--soon {
  border: 1px solid #aaa;
  color: #888;
}

.plan-card-name {
  font-weight: var(--weight-heavy);
  font-size: clamp(22px, 3vw, 28px);
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--c-manifesto-text);
}
.plan-card-sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: #888;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-top: calc(-1 * var(--sp-3));
}

.plan-card-price {
  border-top: 1px solid var(--c-manifesto-line);
  padding-top: var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.plan-card-price-main {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.03em;
  color: var(--c-manifesto-text);
  line-height: 1;
}
.plan-card-price-note {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: #666;
  line-height: 1.6;
}

.plan-card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  flex: 1;
}
.plan-card-list li {
  font-size: var(--text-sm);
  color: var(--c-manifesto-mute);
  padding-left: var(--sp-5);
  position: relative;
  line-height: 1.6;
}
.plan-card-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: #0a0a0a;
}

.plan-card-note {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  color: #666;
  line-height: 1.8;
  letter-spacing: 0.02em;
}
.plan-card-note--mute { color: #999; }

.plan-card-cta {
  margin-top: var(--sp-3);
  display: block;
  text-align: center;
}
.plan-card-cta.btn-primary {
  background: #0a0a0a;
  color: #f4f4f0;
  border-color: #0a0a0a;
}
.plan-card-cta.btn-primary:hover {
  background: transparent;
  color: #0a0a0a;
}
.plan-card-cta--disabled {
  cursor: default;
  pointer-events: none;
  color: #aaa;
  border-color: #ddd;
}

/* ----------------------------------------------------------
   ABOUT BRIEF
   ---------------------------------------------------------- */
.about-brief {
  padding: 140px var(--pad-x);
  border-bottom: var(--border);
}
.about-brief-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 100px;
  align-items: start;
}
@media (max-width: 960px) {
  .about-brief-inner { grid-template-columns: 1fr; gap: var(--sp-16); }
}

.about-brief-quote {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--c-ink);
  margin: var(--sp-8) 0;
  font-style: normal;
}
.about-brief-quote .dot { color: var(--c-accent); }

.about-brief-text {
  font-size: var(--text-base);
  line-height: var(--leading-loose);
  color: var(--c-mute);
  margin-bottom: var(--sp-8);
}
.about-brief-text p { margin-bottom: var(--sp-5); }
.about-brief-text p:last-child { margin-bottom: 0; }

.about-brief-link {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--c-accent);
  font-weight: var(--weight-bold);
  display: inline-block;
  transition: letter-spacing var(--ease);
}
.about-brief-link:hover { letter-spacing: 0.18em; }

.about-brief-sports {
  padding: var(--sp-8);
  border: var(--border);
  background: var(--c-surface-1);
}
.about-brief-sports-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--c-mute);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  margin-bottom: var(--sp-6);
  font-weight: var(--weight-bold);
}
.about-brief-sports-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.about-brief-sports-list li {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--c-mute);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  padding-left: var(--sp-5);
  position: relative;
}
.about-brief-sports-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--c-accent);
}

/* ----------------------------------------------------------
   STATEMENT (legacy — kept for CSS parse safety)
   ---------------------------------------------------------- */
.statement {
  padding: 140px var(--pad-x);
  border-bottom: var(--border);
  position: relative;
  overflow: hidden;
}
.statement::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, transparent, var(--c-accent), transparent);
}
.statement-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 100px;
  align-items: center;
}
@media (max-width: 960px) {
  .statement-inner { grid-template-columns: 1fr; gap: var(--sp-12); }
}

.statement-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--c-accent);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  margin-bottom: var(--sp-8);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-weight: var(--weight-bold);
}
.statement-label::before {
  content: '';
  width: 24px; height: 1px;
  background: var(--c-accent);
  flex-shrink: 0;
}

.statement-h2 {
  font-family: var(--font-display);
  font-size: clamp(32px, 4.5vw, 56px);
  letter-spacing: -0.04em;
  line-height: 1.15;
}
.statement-h2 .dot,
.statement-h2 .line-accent { color: var(--c-accent); }

.statement-body {
  font-size: var(--text-md);
  line-height: var(--leading-loose);
  color: var(--c-mute);
  margin-bottom: var(--sp-8);
}
.statement-body strong { color: var(--c-ink); font-weight: var(--weight-medium); }
.statement-body p { margin-bottom: var(--sp-5); }
.statement-body p:last-child { margin-bottom: 0; }

.role-tags { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-top: var(--sp-8); }
.role-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: var(--border2);
  color: var(--c-mute);
  padding: var(--sp-2) var(--sp-4);
  font-weight: var(--weight-medium);
  transition: border-color var(--ease), color var(--ease);
}
.role-tag:hover { border-color: var(--c-accent); color: var(--c-accent); }

/* ----------------------------------------------------------
   WHY — 課題定義を明確に
   ---------------------------------------------------------- */
.why {
  padding: 140px var(--pad-x);
  border-bottom: var(--border);
  background: var(--c-surface-2);
}
.why-inner { max-width: var(--max-w); margin: 0 auto; }

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
  background: var(--c-line);
  border: var(--border);
  margin-bottom: var(--sp-20);
}
@media (max-width: 719px) { .why-grid { grid-template-columns: 1fr; } }

.why-card {
  background: var(--c-bg);
  padding: 48px 36px;
  position: relative;
  overflow: hidden;
  transition: background var(--ease);
}
.why-card:hover { background: #0f0f0f; }

/* 課題カード上部のアクセントライン（常時表示で「問題」感を出す） */
.why-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--c-line2); /* 常時表示 */
  transition: background var(--ease);
}
.why-card:hover::before { background: var(--c-accent); }

.why-card-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--c-mute);
  letter-spacing: var(--tracking-wider);
  font-weight: var(--weight-bold);
  margin-bottom: var(--sp-7);
  text-transform: uppercase;
}
.why-card h3 {
  font-weight: var(--weight-heavy);
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
  line-height: 1.4;
  margin-bottom: var(--sp-4);
  color: var(--c-ink);
}
.why-card p {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--c-mute);
  margin-bottom: var(--sp-6);
}

/* 課題の結論（✕マーク付きで問題感を強調） */
.why-card-verdict {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--c-accent);
  letter-spacing: var(--tracking-wide);
  padding-top: var(--sp-4);
  border-top: var(--border);
  font-weight: var(--weight-bold);
}

/* PROOF.の答えブロック */
.why-answer {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: start;
  background: var(--c-surface-1);
  border: var(--border-accent);
  padding: 56px 48px;
  position: relative;
}
.why-answer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; bottom: 0;
  width: 3px;
  background: var(--c-accent);
}
@media (max-width: 719px) {
  .why-answer { grid-template-columns: 1fr; gap: var(--sp-8); padding: var(--sp-8); }
}

.why-answer-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--c-accent);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  font-weight: var(--weight-bold);
  margin-bottom: var(--sp-5);
}
.why-answer h3 {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 52px);
  letter-spacing: var(--tracking-tight);
  line-height: 1.1;
  color: var(--c-ink);
}
.why-answer p {
  font-size: var(--text-base);
  line-height: var(--leading-loose);
  color: var(--c-mute);
}
.why-answer p strong { color: var(--c-ink); font-weight: var(--weight-medium); }

/* ----------------------------------------------------------
   HOW WE WORK
   ---------------------------------------------------------- */
.how {
  padding: 140px var(--pad-x);
  border-bottom: var(--border);
}
.how-inner { max-width: var(--max-w); margin: 0 auto; }

.how-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
  background: var(--c-line);
  border: var(--border);
  margin-top: var(--sp-16);
}
@media (max-width: 560px) { .how-flow { grid-template-columns: 1fr; } }

.how-step {
  background: var(--c-bg);
  padding: 48px 32px;
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  min-height: 280px;
  transition: background var(--ease);
}
.how-step:hover { background: var(--c-surface-1); }

.how-step-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--c-accent);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  font-weight: var(--weight-bold);
}
.how-step-icon {
  color: var(--c-accent); /* SVGアイコンはcurrentColorで色を継承 */
  margin: var(--sp-2) 0;
  display: flex;
  align-items: center;
}
.how-step h3 {
  font-weight: var(--weight-heavy);
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--c-ink);
}
.how-step p {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--c-mute);
  flex: 1;
}
.how-step-owner {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  padding: var(--sp-1) var(--sp-3);
  display: inline-block;
  margin-top: auto;
}
.how-step-owner.proof {
  background: var(--c-accent);
  color: var(--c-bg);
  font-weight: var(--weight-bold);
}
.how-step-owner.shooter {
  border: 1px solid var(--c-mute);
  color: var(--c-mute);
}

/* ----------------------------------------------------------
   FOR WHO
   ---------------------------------------------------------- */
.forwho {
  padding: 140px var(--pad-x);
  border-bottom: var(--border);
}
.forwho-inner { max-width: var(--max-w); margin: 0 auto; }

.forwho-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--grid-gap);
  background: var(--c-line);
  border: var(--border);
  margin-top: var(--sp-16);
}
@media (max-width: 719px) { .forwho-grid { grid-template-columns: 1fr; } }

.forwho-card {
  background: var(--c-bg);
  padding: 56px 48px;
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
  min-height: 320px;
  transition: background var(--ease);
  text-decoration: none;
  color: inherit;
}
.forwho-card:hover { background: var(--c-surface-1); }
@media (max-width: 719px) { .forwho-card { padding: var(--sp-10) var(--sp-8); min-height: unset; } }

.forwho-card-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--c-mute);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
}
.forwho-card h3 {
  font-family: var(--font-display);
  font-size: clamp(48px, 6vw, 72px);
  letter-spacing: var(--tracking-tight);
  line-height: 1.0;
}
.forwho-card h3 .dot { color: var(--c-accent); }
.forwho-card > p {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--c-mute);
  max-width: 40ch;
}

.forwho-card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  flex: 1;
}
.forwho-card-list li {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--c-mute);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  padding-left: var(--sp-5);
  position: relative;
}
.forwho-card-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--c-accent);
}

.forwho-card-cta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--c-accent);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  font-weight: var(--weight-bold);
  padding-top: var(--sp-5);
  border-top: var(--border);
  transition: letter-spacing var(--ease);
}
.forwho-card:hover .forwho-card-cta { letter-spacing: 0.22em; }

/* ----------------------------------------------------------
   CTA
   ---------------------------------------------------------- */
.top-cta {
  padding: 160px var(--pad-x);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.top-cta::before {
  content: 'PROOF.';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-size: clamp(120px, 20vw, 280px);
  letter-spacing: -0.06em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(244,244,240,0.03);
  pointer-events: none;
  white-space: nowrap;
}
.top-cta-inner {
  max-width: 640px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}
.top-cta-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--c-accent);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  font-weight: var(--weight-bold);
  margin-bottom: var(--sp-7);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
}
.top-cta-label::before,
.top-cta-label::after {
  content: '';
  width: 24px; height: 1px;
  background: var(--c-accent);
}
.top-cta-h2 {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 80px);
  letter-spacing: var(--tracking-tight);
  line-height: 1.05;
  margin-bottom: var(--sp-7);
}
.top-cta-h2 .dot { color: var(--c-accent); }
.top-cta-body {
  font-size: var(--text-md);
  line-height: var(--leading-loose);
  color: var(--c-mute);
  margin-bottom: var(--sp-12);
}
.top-cta-body strong { color: var(--c-ink); font-weight: var(--weight-medium); }
.top-cta-actions {
  display: flex;
  gap: var(--sp-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ----------------------------------------------------------
   アニメーション
   ---------------------------------------------------------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}