/* ===================================
   CONCEPT PAGE - Dedicated Styles
=================================== */

/* ===== CONCEPT HERO ===== */
.concept-hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.concept-hero-bg {
  position: absolute;
  inset: 0;
}

.concept-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
  filter: brightness(0.4) contrast(1.15) saturate(0.8);
}

.concept-hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom,
      rgba(10,12,16,0.3) 0%,
      rgba(10,12,16,0.55) 50%,
      rgba(10,12,16,0.9) 100%
    );
}

.concept-hero-content {
  position: relative;
  z-index: 2;
  padding-top: 72px;
}

.concept-hero-title {
  font-family: var(--font-en);
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.01em;
  margin: 16px 0 20px;
}

.concept-hero-title span {
  color: var(--color-accent);
  display: block;
}

.concept-hero-sub {
  font-family: var(--font-ja);
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  font-weight: 300;
  letter-spacing: 0.2em;
  color: var(--color-white);
  line-height: 2;
}

/* ===== CONCEPT SECTIONS ===== */
.concept-section {
  padding: 120px 0;
  position: relative;
}

.concept-section.bg-dark {
  background: var(--color-bg2);
}

.section-header-center {
  text-align: center;
  margin-bottom: 70px;
}

.section-header-center .section-label {
  justify-content: center;
}
.section-header-center .section-label::before {
  display: none;
}

.concept-h2 {
  font-family: var(--font-ja);
  font-size: clamp(1.7rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.06em;
  margin: 12px 0 0;
}
.concept-h2 em {
  font-style: normal;
  color: var(--color-accent);
}
.concept-h2.center { text-align: center; }

.concept-lead {
  font-size: 0.97rem;
  color: var(--color-white);
  line-height: 1.9;
  margin-top: 16px;
}
.concept-lead.center { text-align: center; }

.concept-body {
  font-size: 0.95rem;
  color: var(--color-white);
  line-height: 2;
  margin-top: 20px;
}

/* 2カラムレイアウト */
.concept-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.concept-two-col.reverse {
  direction: rtl;
}
.concept-two-col.reverse > * {
  direction: ltr;
}

.concept-image-block {
  position: relative;
}

.concept-image-block img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  filter: brightness(0.82) contrast(1.08) saturate(0.88);
}

.concept-image-block::before {
  content: '';
  position: absolute;
  top: -14px;
  right: -14px;
  left: 14px;
  bottom: 14px;
  border: 1px solid rgba(26,111,196,0.25);
  z-index: -1;
}

.concept-image-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(10,12,16,0.85) 0%, transparent 100%);
  padding: 24px 20px 16px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.concept-image-caption span {
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--color-accent2);
}

.concept-text-block .section-label {
  margin-bottom: 16px;
}

/* ===== BIG QUOTE ===== */
.concept-quote-section {
  padding: 100px 0;
  background: var(--color-navy);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
  position: relative;
}

.concept-quote-section::before {
  content: '"';
  position: absolute;
  top: -60px;
  left: -20px;
  font-family: var(--font-en-display);
  font-size: 30rem;
  color: rgba(255,255,255,0.015);
  line-height: 1;
  pointer-events: none;
}

.big-quote {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.quote-mark {
  display: block;
  font-family: var(--font-en-display);
  font-size: 5rem;
  color: var(--color-accent);
  line-height: 0.6;
  margin-bottom: 30px;
  opacity: 0.7;
}

.big-quote p,
.big-quote {
  font-family: var(--font-ja);
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.7;
  letter-spacing: 0.08em;
  color: var(--color-white);
}

.quote-accent {
  color: var(--color-accent);
  display: block;
  margin-top: 10px;
}

.big-quote cite {
  display: block;
  font-style: normal;
  font-family: var(--font-en);
  font-size: 0.85rem;
  color: var(--color-accent2);
  letter-spacing: 0.15em;
  margin-top: 32px;
}

/* ===== PILLAR CARDS ===== */
.pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.pillar-card {
  background: var(--color-navy);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: var(--transition);
}

.pillar-card:hover {
  border-color: rgba(26,111,196,0.4);
  transform: translateY(-6px);
}

.pillar-image {
  position: relative;
  overflow: hidden;
}

.pillar-image img {
  width: 100%;
  aspect-ratio: 3/2;
  object-fit: cover;
  filter: brightness(0.65) contrast(1.1) saturate(0.8);
  transition: transform 0.6s ease;
}

.pillar-card:hover .pillar-image img {
  transform: scale(1.05);
}

.pillar-num {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--color-accent);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 700;
}

.pillar-body {
  padding: 28px 24px;
}

.pillar-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}

.pillar-body p {
  font-size: 0.85rem;
  color: var(--color-white);
  line-height: 1.85;
}

/* ===== COACH STORY ===== */
.coach-story {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: center;
}

.coach-story-image {
  position: relative;
}

.coach-story-image img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: top;
  filter: brightness(0.85) contrast(1.1) saturate(0.85);
}

/* 画像右側へなめらかなフェード */
.coach-story-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right,
      transparent 0%,
      rgba(10,12,16,0.1) 55%,
      rgba(10,12,16,0.65) 85%,
      rgba(10,12,16,1.0) 100%
    ),
    linear-gradient(to bottom,
      transparent 60%,
      rgba(10,12,16,0.75) 100%
    );
}

.coach-story-label {
  position: absolute;
  bottom: 24px;
  left: 24px;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.coach-story-label span {
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--color-accent);
}

.coach-story-label strong {
  font-family: var(--font-ja);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.15em;
}

.coach-highlights {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 36px;
  padding: 24px;
  background: var(--color-navy);
  border-left: 2px solid var(--color-accent);
}

.highlight-item {
  display: flex;
  gap: 20px;
  align-items: center;
  font-size: 0.88rem;
}

.hi-label {
  color: var(--color-accent);
  font-family: var(--font-en);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  min-width: 140px;
}

.hi-val {
  color: var(--color-white);
}

/* ===== VISUAL GRID ===== */
.visual-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 4px;
  height: 560px;
}

.visual-col {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.visual-item {
  position: relative;
  overflow: hidden;
  flex: 1;
}

.visual-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.6) contrast(1.1) saturate(0.8);
  transition: transform 0.7s ease, filter 0.4s ease;
}

.visual-item:hover img {
  transform: scale(1.04);
  filter: brightness(0.75) contrast(1.1) saturate(0.9);
}

.visual-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(10,12,16,0.8) 0%, transparent 100%);
  padding: 20px 20px 16px;
  transform: translateY(4px);
  transition: var(--transition);
}

.visual-item:hover .visual-overlay {
  transform: translateY(0);
}

.visual-overlay p {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--color-white);
  line-height: 1.5;
}

/* ===== DIFFERENCE LIST ===== */
.difference-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 60px;
}

.diff-item {
  display: flex;
  gap: 40px;
  padding: 36px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
  transition: var(--transition);
}

.diff-item:first-child {
  border-top: 1px solid var(--color-border);
}

.diff-item:hover {
  background: rgba(26,111,196,0.03);
  padding-left: 10px;
  padding-right: 10px;
}

.diff-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  background: rgba(26,111,196,0.12);
  border: 1px solid rgba(26,111,196,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
}

.diff-content h3 {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.4;
  margin-bottom: 12px;
}

.diff-content p {
  font-size: 0.88rem;
  color: var(--color-white);
  line-height: 1.9;
}

/* ===== GOLDEN AGE ===== */
.golden-age-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.age-timeline {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 40px;
  padding: 24px;
  background: var(--color-navy);
}

.age-item {
  flex: 1;
  text-align: center;
  padding: 16px;
}

.age-item.highlight {
  background: rgba(26,111,196,0.15);
  border: 1px solid rgba(26,111,196,0.4);
}

.age-num {
  display: block;
  font-family: var(--font-en);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 6px;
}

.age-item.highlight .age-num {
  color: var(--color-accent);
}

.age-label {
  font-size: 0.75rem;
  color: var(--color-white);
  letter-spacing: 0.06em;
  line-height: 1.6;
}

.age-item.highlight .age-label {
  color: var(--color-white);
}

.age-arrow {
  color: var(--color-accent);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.golden-age-image img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  filter: brightness(0.8) contrast(1.1) saturate(0.85);
}

/* ===== CHECKLIST ===== */
.concept-checklist {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.concept-checklist li {
  display: flex;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--color-white);
  line-height: 1.5;
  align-items: flex-start;
}

.concept-checklist li::before {
  content: '✓';
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ===== CTA SECTION ===== */
.concept-cta {
  padding: 140px 0;
  background: var(--color-navy);
  border-top: 1px solid var(--color-border);
  overflow: hidden;
  position: relative;
}

.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.cta-bg-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-en-display);
  font-size: 16rem;
  color: rgba(255,255,255,0.02);
  letter-spacing: 0.05em;
  line-height: 1;
  pointer-events: none;
  white-space: nowrap;
  z-index: 0;
}

.cta-inner .section-label {
  justify-content: center;
  margin-bottom: 20px;
}
.cta-inner .section-label::before { display: none; }

.cta-title {
  font-family: var(--font-ja);
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.06em;
  margin-bottom: 20px;
}

.cta-title span {
  display: block;
  font-size: clamp(1rem, 2vw, 1.3rem);
  font-weight: 300;
  color: var(--color-white);
  letter-spacing: 0.1em;
  margin-top: 8px;
}

.cta-desc {
  font-size: 0.9rem;
  color: var(--color-white);
  line-height: 1.9;
  margin-bottom: 40px;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .pillar-grid { grid-template-columns: 1fr; gap: 20px; }
  .coach-story { grid-template-columns: 1fr; gap: 40px; }
  .visual-grid { height: auto; grid-template-columns: 1fr; }
  .visual-col { flex-direction: row; }
  .visual-item { min-height: 200px; }
}

@media (max-width: 768px) {
  .concept-two-col,
  .golden-age-block { grid-template-columns: 1fr; gap: 40px; }
  .concept-two-col.reverse { direction: ltr; }
  .age-timeline { flex-wrap: wrap; }
  .age-arrow { display: none; }
  .cta-bg-text { font-size: 6rem; }
  .diff-item { flex-direction: column; gap: 20px; }
  .visual-col { flex-direction: column; }
}