/**
 * opus — Front Page Redesign
 * Design system: coral × sage × dark ink
 *
 * @package opus-theme
 */

/* ============================================
   DESIGN TOKENS
   ============================================ */
:root {
  --coral:        #D97065;
  --coral-light:  #E8A09A;
  --coral-pale:   #FDF4F3;

  --sage:         #6BADA0;
  --sage-light:   #9DCFC5;
  --sage-pale:    #F0FAF8;
  --sage-dark:    #112825;
  --sage-mid:     #1D4038;

  --ink:          #111827;
  --ink-mid:      #1F2937;
  --off-white:    #F7F9FC;
  --gray-border:  #E2E8F0;
  --gray-sub:     #64748B;
  --white:        #FFFFFF;

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Inter', 'Noto Sans JP', -apple-system, sans-serif;
}

/* ============================================
   SECTION LABEL (Spir-style: small-caps + line)
   ============================================ */
.section-label {
  display: inline-flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.section-label__text {
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--coral);
}

.section-label__line {
  width: 100%;
  height: 1px;
  background: var(--gray-border);
}

/* Dark section overrides */
.section--dark .section-label__text { color: var(--sage-light); }
.section--dark .section-label__line { background: rgba(255,255,255,0.15); }

/* ============================================
   DISPLAY TYPOGRAPHY
   ============================================ */
.display-en {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.75rem, 5.5vw, 5rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 1.5rem;
}

.display-en--white { color: var(--white); }

.display-jp {
  font-family: var(--font-body);
  font-size: clamp(1.35rem, 2.5vw, 1.875rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.5;
  margin-bottom: 1.25rem;
  color: var(--ink);
}

.body-text {
  font-size: 0.95rem;
  line-height: 2.1;
  color: #334155;
  max-width: 540px;
}

.section--dark .body-text { color: rgba(255,255,255,0.65); }

/* ============================================
   FADE-IN
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ============================================
   HERO (override existing)
   ============================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  padding: 0;
  text-align: left;
  /* CSS fallback if WebGL fails */
  background: linear-gradient(160deg, #0D1F17 0%, #111827 45%, #1C1108 80%, #2A1200 100%);
}

/* noise overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.07'/%3E%3C/svg%3E");
  background-size: 180px 180px;
  opacity: 0.38;
  pointer-events: none;
  z-index: 1;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
}

.hero__veil {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.08);
  pointer-events: none;
  z-index: 1;
}

/* Orbs */
.hero__orb-1 {
  position: absolute;
  bottom: -5%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 50%,
    rgba(217,112,101,0.5) 0%,
    rgba(232,160,154,0.2) 45%,
    transparent 70%
  );
  filter: blur(60px);
  pointer-events: none;
  z-index: 1;
  will-change: transform;
}

.hero__orb-2 {
  position: absolute;
  top: -10%;
  left: -8%;
  width: 45vw;
  height: 45vw;
  border-radius: 50%;
  background: radial-gradient(circle at 55% 45%,
    rgba(107,173,160,0.45) 0%,
    rgba(157,207,197,0.15) 50%,
    transparent 70%
  );
  filter: blur(55px);
  pointer-events: none;
  z-index: 1;
  will-change: transform;
}

/* Inner content */
.hero__inner {
  position: relative;
  z-index: 2;
  padding: 0 3rem 0;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  will-change: transform;
}

.hero__tagline {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
  margin-bottom: 1.25rem;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(5rem, 13vw, 13rem);
  font-weight: 300;
  line-height: 1.0;
  letter-spacing: -0.02em;
  color: rgba(255,255,255,0.92);
  margin: 0 0 0 -0.04em;
}

.hero__subtitle-block {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 2rem 0 2.5rem;
  border-top: 1px solid rgba(255,255,255,0.2);
  margin-top: 1.25rem;
  gap: 2rem;
}

.hero__subtitle {
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
  line-height: 2;
  max-width: 400px;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 2rem;
  border: 1px solid rgba(255,255,255,0.5);
  color: rgba(255,255,255,0.9);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  white-space: nowrap;
  transition: background 0.25s;
  text-decoration: none;
}

.hero__cta:hover {
  background: rgba(255,255,255,0.12);
  opacity: 1;
  color: var(--white);
}

/* Strip */
@keyframes strip-breathe {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.82; }
}

.hero__strip {
  height: 68px;
  position: relative;
  z-index: 2;
  background: linear-gradient(to right,
    rgba(217,112,101,0.9)  0%,
    rgba(107,173,160,0.55) 28%,
    rgba(17, 40, 37, 1)    28%,
    rgba(17, 40, 37, 1)    28.4%,
    rgba(17, 40, 37, 0.85) 28.4%,
    rgba(107,173,160,0.6)  65%,
    rgba(217,112,101,0.45) 100%
  );
  animation: strip-breathe 5s ease-in-out infinite;
}

/* ============================================
   MISSION
   ============================================ */
.mission {
  background: var(--white);
  position: relative;
  overflow: hidden;
  padding: 7rem 0;
}

.mission__orb {
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 60vw;
  height: 60vw;
  border-radius: 50%;
  background: radial-gradient(circle,
    rgba(107,173,160,0.14) 0%,
    rgba(157,207,197,0.06) 55%,
    transparent 70%
  );
  filter: blur(60px);
  pointer-events: none;
  will-change: transform;
}

.mission__orb-2 {
  position: absolute;
  top: -15%;
  right: -8%;
  width: 50vw;
  height: 50vw;
  border-radius: 50%;
  background: radial-gradient(circle,
    rgba(217,112,101,0.12) 0%,
    transparent 65%
  );
  filter: blur(50px);
  pointer-events: none;
  will-change: transform;
}

.mission__inner {
  position: relative;
  z-index: 1;
  max-width: 640px;
  /* 左揃え — containerの左端から始まる */
  margin-right: auto;
}

/* ============================================
   PRODUCTS (bordered grid)
   ============================================ */
.products-section {
  background: var(--off-white);
  padding: 7rem 0;
}

.section-header-row {
  margin-bottom: 4rem;
}

.products-grid-main {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--gray-border);
}

.product-item {
  padding: 3rem 2.5rem;
  border-right: 1px solid var(--gray-border);
  position: relative;
  background: var(--white);
  transition: background 0.25s;
}

.product-item:last-child { border-right: none; }

.product-item:hover { background: #FAFBFC; }

.product-item__number {
  font-family: var(--font-display);
  font-size: 4.5rem;
  font-weight: 300;
  color: var(--gray-border);
  line-height: 1;
  margin-bottom: 1.5rem;
  user-select: none;
}

.product-item__tag {
  display: inline-block;
  font-size: 0.63rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 0.875rem;
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
}

.product-item--sonata .product-item__tag { background: #FFF1EB; color: #EA580C; }
.product-item--rondo  .product-item__tag { background: #F5F0FF; color: #7C3AED; }
.product-item--etude  .product-item__tag { background: var(--sage-pale); color: var(--sage); }

.product-item__name {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-bottom: 0.375rem;
  color: var(--ink);
}

.product-item__kana {
  font-size: 0.72rem;
  color: var(--gray-sub);
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

.product-item__desc {
  font-size: 0.875rem;
  color: #475569;
  line-height: 2;
  margin-bottom: 1.5rem;
}

.product-item__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--gray-sub);
  border-bottom: 1px solid var(--gray-border);
  padding-bottom: 0.125rem;
  transition: all 0.2s;
  text-decoration: none;
}

.product-item__link:hover {
  color: var(--ink);
  border-color: var(--ink);
  opacity: 1;
}

/* ============================================
   VISION (dark sage section)
   ============================================ */
.vision-opus {
  background: var(--sage-dark);
  position: relative;
  overflow: hidden;
  padding: 7rem 0;
}

.vision-opus__bg-orb {
  position: absolute;
  top: -20%;
  right: -15%;
  width: 70vw;
  height: 70vw;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%,
    rgba(217,112,101,0.28) 0%,
    rgba(107,173,160,0.15) 60%,
    transparent 75%
  );
  filter: blur(80px);
  pointer-events: none;
  will-change: transform;
}

.vision-opus__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 4rem;
  position: relative;
  z-index: 1;
}

.vision-item {
  padding: 3rem 2.5rem;
  border-right: 1px solid rgba(255,255,255,0.1);
}

.vision-item:last-child { border-right: none; }

.vision-item__en {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 3.5vw, 3.5rem);
  font-weight: 300;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: 0.625rem;
}

.vision-item__jp {
  font-size: 0.8rem;
  color: var(--sage-light);
  letter-spacing: 0.06em;
  margin-bottom: 2rem;
}

.vision-item__desc {
  font-size: 0.825rem;
  line-height: 2.1;
  color: rgba(255,255,255,0.58);
}

/* ============================================
   FOUNDER (dot-grid background)
   ============================================ */
.founder-section {
  background-color: var(--off-white);
  background-image: radial-gradient(circle, #CBD5E1 1px, transparent 1px);
  background-size: 28px 28px;
  padding: 7rem 0;
}

.founder-inner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6rem;
  align-items: center;
}

.founder-photo {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  overflow: hidden;
  background: linear-gradient(135deg, var(--sage) 0%, var(--coral) 100%);
  flex-shrink: 0;
}

.founder-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.founder-name {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--gray-sub);
  margin-bottom: 0.375rem;
}

.founder-title-name {
  font-family: var(--font-display);
  font-size: 1.875rem;
  font-weight: 400;
  color: var(--ink);
  margin-bottom: 1.75rem;
}

.founder-quote {
  border-left: 2px solid var(--coral);
  padding-left: 1.5rem;
  margin-bottom: 1.75rem;
}

.founder-quote p {
  font-family: var(--font-display);
  font-size: 1.175rem;
  font-style: italic;
  color: var(--ink);
  line-height: 1.75;
}

.founder-bio {
  font-size: 0.9rem;
  line-height: 2.1;
  color: #334155;
  margin-bottom: 1rem;
}

.interview-link {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
  padding-bottom: 0.125rem;
  text-decoration: none;
  transition: all 0.2s;
  margin-top: 0.75rem;
}

.interview-link:hover {
  color: var(--coral);
  border-color: var(--coral);
  opacity: 1;
}

/* ============================================
   BLOG (polaroid cards on dot-grid)
   ============================================ */
.blog-posts {
  background-color: var(--off-white);
  background-image: radial-gradient(circle, #CBD5E1 1px, transparent 1px);
  background-size: 28px 28px;
  padding: 7rem 0;
}

.blog-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.post-card {
  background: var(--white);
  border: 1px solid var(--gray-border);
  padding: 0 0 1.5rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
  display: block;
  text-decoration: none;
  color: inherit;
}

.post-card:hover {
  transform: translateY(-4px) rotate(0.4deg);
  box-shadow: 0 10px 32px rgba(0,0,0,0.07);
  opacity: 1;
}

.post-card__thumb {
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  margin-bottom: 1.25rem;
}

.post-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.post-card:hover .post-card__thumb img {
  transform: scale(1.04);
}

.post-card__thumb--empty {
  background: linear-gradient(135deg, var(--sage-pale) 0%, var(--coral-pale) 100%);
}

.post-card__body {
  padding: 0 1.5rem;
}

.post-card__category {
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--coral);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.post-card__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.post-card__date {
  font-size: 0.73rem;
  color: var(--gray-sub);
}

/* ============================================
   CTA (dark gradient)
   ============================================ */
.cta-opus {
  background: linear-gradient(160deg, var(--ink) 0%, #0D1F17 60%, #1C1108 100%);
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 7rem 0;
}

.cta-opus__orb {
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 80vw;
  height: 80vw;
  border-radius: 50%;
  background: radial-gradient(circle,
    rgba(217,112,101,0.22) 0%,
    rgba(107,173,160,0.12) 50%,
    transparent 70%
  );
  filter: blur(60px);
  pointer-events: none;
}

.cta-opus__inner { position: relative; z-index: 1; }

.cta-opus .display-en {
  color: var(--white);
  font-size: clamp(3rem, 7vw, 7rem);
  margin-bottom: 1.25rem;
}

.cta-opus__sub {
  color: rgba(255,255,255,0.58);
  font-size: 1rem;
  margin-bottom: 2.5rem;
}

.cta-opus__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-opus {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.875rem 2.25rem;
  border: 1px solid var(--ink);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  transition: all 0.2s;
  text-decoration: none;
  cursor: pointer;
  background: transparent;
}

.btn-opus:hover {
  background: var(--ink);
  color: var(--white);
  opacity: 1;
}

.btn-opus--white {
  border-color: rgba(255,255,255,0.5);
  color: rgba(255,255,255,0.88);
}

.btn-opus--white:hover {
  background: rgba(255,255,255,0.12);
  color: var(--white);
}

.btn-opus--filled {
  background: var(--white);
  color: var(--ink);
  border-color: var(--white);
}

.btn-opus--filled:hover {
  background: rgba(255,255,255,0.88);
  color: var(--ink);
}

.section-more {
  text-align: center;
  margin-top: 3rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
  .products-grid-main {
    grid-template-columns: 1fr;
    border: none;
  }

  .product-item {
    border-right: none;
    border-bottom: 1px solid var(--gray-border);
  }

  .product-item:last-child { border-bottom: none; }

  .vision-opus__grid {
    grid-template-columns: 1fr;
  }

  .vision-item {
    border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }

  .vision-item:last-child { border-bottom: none; }

  .founder-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .founder-photo {
    width: 200px;
    height: 200px;
  }

  .blog-cards {
    grid-template-columns: 1fr;
  }

  .hero__subtitle-block {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }

  .hero__inner {
    padding: 0 1.5rem 0;
  }
}