/* about.css — IMAとは / マニフェスト */

/* ═══════════════════════════════
   ヒーロー大宣言
═══════════════════════════════ */
.about-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: radial-gradient(120% 90% at 50% 0%, var(--washi) 0%, var(--kinari) 55%, var(--kinari-deep) 100%);
  padding: clamp(100px, 14vh, 160px) clamp(24px, 6vw, 80px) clamp(80px, 10vh, 120px);
}

.about-hero__bg-kanji {
  position: absolute;
  font-family: "Zen Old Mincho", serif;
  font-weight: 700;
  font-size: clamp(18rem, 50vw, 44rem);
  color: var(--sumi);
  opacity: .028;
  user-select: none;
  pointer-events: none;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  line-height: 1;
  letter-spacing: -.04em;
}

.about-hero__enso {
  position: absolute;
  width: clamp(280px, 40vw, 540px);
  height: clamp(280px, 40vw, 540px);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-18deg);
  pointer-events: none;
}

.about-hero__enso circle {
  fill: none;
  stroke: var(--shu);
  stroke-width: 2.6;
  stroke-linecap: round;
  stroke-dasharray: 1570;
  stroke-dashoffset: 1570;
  opacity: .62;
  animation: draw 2.8s var(--ease-soft) .3s forwards;
}

@keyframes draw { to { stroke-dashoffset: 140; } }

.about-hero__inner {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.about-hero__h1 {
  font-family: "Zen Old Mincho", serif;
  font-size: clamp(2rem, 5.5vw, 4rem);
  font-weight: 600;
  letter-spacing: .1em;
  line-height: 1.55;
  color: var(--sumi);
  margin: clamp(20px, 3vw, 32px) 0 0;
}

.about-hero__tagline {
  font-family: "Zen Old Mincho", serif;
  font-size: clamp(1rem, 2.2vw, 1.52rem);
  font-weight: 500;
  letter-spacing: .14em;
  line-height: 2;
  color: var(--sumi);
  margin-top: clamp(24px, 4vw, 36px);
}

.about-hero__sub {
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  font-size: clamp(.8rem, 1.3vw, .94rem);
  letter-spacing: .3em;
  color: var(--sumi-soft);
  margin-top: 20px;
}

.about-hero__vert {
  position: absolute;
  right: clamp(18px, 3.5vw, 56px);
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-family: "Zen Old Mincho", serif;
  font-size: .66rem;
  letter-spacing: .75em;
  color: var(--sumi-soft);
  opacity: .38;
  user-select: none;
  pointer-events: none;
}

/* ═══════════════════════════════
   マニフェスト宣言（dark）
═══════════════════════════════ */
.about-declare {
  background: var(--sumi);
  padding: clamp(90px, 15vh, 160px) clamp(24px, 8vw, 120px);
  text-align: center;
}

.about-declare__lines {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.about-declare__line {
  font-family: "Zen Old Mincho", serif;
  font-size: clamp(1.05rem, 2.2vw, 1.6rem);
  font-weight: 500;
  letter-spacing: .13em;
  line-height: 1.85;
  color: var(--kinari);
  padding: clamp(28px, 5vw, 48px) 0;
  position: relative;
}

.about-declare__line:not(:last-child)::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 1px;
  background: rgba(244,238,225,.15);
}

.about-declare__line em {
  display: block;
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  font-weight: 300;
  font-size: .58em;
  letter-spacing: .32em;
  color: var(--kin-soft);
  margin-top: 12px;
}

/* ═══════════════════════════════
   なぜここが必要か
═══════════════════════════════ */
.about-why {
  padding: clamp(90px, 15vh, 160px) clamp(24px, 8vw, 140px);
  background: var(--washi);
}

.about-why__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(40px, 6vw, 64px);
  max-width: 1000px;
  margin: 0 auto;
  align-items: start;
}

.about-why__num {
  font-family: "Zen Old Mincho", serif;
  font-size: clamp(5rem, 12vw, 10rem);
  font-weight: 700;
  color: var(--sumi);
  opacity: .055;
  line-height: 1;
  user-select: none;
  letter-spacing: -.02em;
}

.about-why__body p {
  font-size: clamp(.9rem, 1.5vw, 1.03rem);
  letter-spacing: .06em;
  line-height: 2.3;
  color: var(--sumi-soft);
  margin-bottom: 1.6em;
}

.about-why__body p:last-child { margin-bottom: 0; }

.about-why__lead {
  font-family: "Zen Old Mincho", serif;
  font-size: clamp(1.1rem, 2vw, 1.38rem);
  font-weight: 500;
  color: var(--sumi);
  letter-spacing: .1em;
  line-height: 1.88;
  margin-bottom: 1.5em;
}

@media (min-width: 900px) {
  .about-why__grid { grid-template-columns: auto 1fr; }
}

/* ═══════════════════════════════
   「今」の二重の意味
═══════════════════════════════ */
.about-dual {
  padding: clamp(90px, 15vh, 160px) clamp(24px, 8vw, 140px);
  background: var(--kinari);
}

.about-dual__head {
  max-width: 640px;
  margin: 0 auto clamp(56px, 9vw, 96px);
  text-align: center;
}

.about-dual__head p {
  font-size: clamp(.88rem, 1.4vw, .98rem);
  letter-spacing: .06em;
  line-height: 2.1;
  color: var(--sumi-soft);
  margin-top: clamp(14px, 2vw, 20px);
}

.about-dual__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  max-width: 1080px;
  margin: 0 auto;
}

.about-dual__side {
  background: var(--kinari);
  padding: clamp(40px, 6vw, 72px) clamp(28px, 4.5vw, 60px);
  transition: background .5s var(--ease);
}

.about-dual__side:hover { background: var(--washi); }

.about-dual__accent {
  font-family: "Zen Old Mincho", serif;
  font-size: clamp(2.8rem, 6vw, 4.8rem);
  font-weight: 700;
  color: var(--shu);
  opacity: .14;
  line-height: 1;
  margin-bottom: 22px;
  letter-spacing: -.02em;
  user-select: none;
}

.about-dual__label {
  display: block;
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  font-size: .76rem;
  letter-spacing: .3em;
  color: var(--shu);
  margin-bottom: 10px;
}

.about-dual__title {
  font-family: "Zen Old Mincho", serif;
  font-size: clamp(1.05rem, 1.85vw, 1.36rem);
  font-weight: 600;
  letter-spacing: .09em;
  line-height: 1.65;
  color: var(--sumi);
  margin-bottom: 22px;
}

.about-dual__title em {
  display: block;
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  font-weight: 300;
  font-size: .6em;
  letter-spacing: .3em;
  color: var(--sumi-soft);
  margin-top: 8px;
}

.about-dual__text {
  font-size: clamp(.85rem, 1.3vw, .95rem);
  letter-spacing: .05em;
  line-height: 2.2;
  color: var(--sumi-soft);
}

@media (min-width: 820px) {
  .about-dual__grid { grid-template-columns: 1fr 1fr; }
}

/* ═══════════════════════════════
   科学と思想のまなざし（dark）
═══════════════════════════════ */
.about-axes {
  padding: clamp(90px, 15vh, 160px) clamp(24px, 8vw, 140px);
  background: var(--sumi);
}

.about-axes .eyebrow       { color: var(--kin-soft); }
.about-axes .eyebrow::before { background: var(--kin-soft); }
.about-axes .eyebrow b     { color: rgba(244,238,225,.45); }

.about-axes .h2 {
  color: var(--kinari);
  text-align: center;
  margin-bottom: clamp(56px, 8vw, 88px);
}

.about-axes__grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  max-width: 1040px;
  margin: 0 auto;
}

.about-axes__sep {
  font-family: "Cormorant Garamond", serif;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--kin);
  opacity: .3;
  padding: 0 clamp(20px, 4vw, 48px);
  align-self: center;
  user-select: none;
}

.about-axes__col-label {
  display: block;
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  font-size: .76rem;
  letter-spacing: .3em;
  color: var(--kin-soft);
  margin-bottom: 18px;
}

.about-axes__col-title {
  font-family: "Zen Old Mincho", serif;
  font-size: clamp(1rem, 1.75vw, 1.36rem);
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--kinari);
  line-height: 1.68;
  margin-bottom: 22px;
}

.about-axes__col-text {
  font-size: clamp(.82rem, 1.3vw, .93rem);
  letter-spacing: .05em;
  line-height: 2.15;
  color: rgba(244,238,225,.6);
}

@media (max-width: 820px) {
  .about-axes__grid {
    grid-template-columns: 1fr;
    gap: clamp(48px, 8vw, 64px);
  }

  .about-axes__sep { display: none; }
}

/* ═══════════════════════════════
   私たちが守るもの
═══════════════════════════════ */
.about-pledge {
  padding: clamp(90px, 15vh, 160px) clamp(24px, 8vw, 140px);
  background: var(--washi);
}

.about-pledge__head {
  max-width: 640px;
  margin: 0 auto clamp(56px, 8vw, 88px);
  text-align: center;
}

.about-pledge__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  max-width: 1000px;
  margin: 0 auto;
}

.about-pledge__item {
  background: var(--washi);
  padding: clamp(32px, 5vw, 52px) clamp(24px, 4vw, 44px);
  transition: background .4s var(--ease);
}

.about-pledge__item:hover { background: var(--kinari); }

.about-pledge__num {
  display: block;
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  font-size: clamp(2rem, 4vw, 3.2rem);
  color: var(--shu);
  opacity: .13;
  line-height: 1;
  margin-bottom: 18px;
}

.about-pledge__en {
  display: block;
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  font-size: .72rem;
  letter-spacing: .28em;
  color: var(--sumi-soft);
  margin-bottom: 7px;
}

.about-pledge__ja {
  display: block;
  font-family: "Zen Old Mincho", serif;
  font-size: clamp(.95rem, 1.6vw, 1.18rem);
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--sumi);
  margin-bottom: 14px;
}

.about-pledge__desc {
  font-size: clamp(.78rem, 1.15vw, .86rem);
  letter-spacing: .04em;
  line-height: 2;
  color: var(--sumi-soft);
}

@media (max-width: 640px) {
  .about-pledge__grid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════
   結び・落款
═══════════════════════════════ */
.about-seal-sec {
  padding: clamp(100px, 16vh, 180px) clamp(24px, 8vw, 140px);
  background: var(--kinari);
  text-align: center;
}

.about-seal {
  width: 96px;
  height: 96px;
  margin: 0 auto clamp(44px, 7vw, 64px);
  border-radius: 11px;
  background: var(--shu);
  color: var(--washi);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Zen Old Mincho", serif;
  font-size: 50px;
  font-weight: 700;
  box-shadow: 0 12px 44px rgba(184,70,44,.26);
  border: 3px solid var(--shu-deep);
  transform: rotate(-6deg) scale(0);
  opacity: 0;
}

.about-seal.stamp {
  animation: about-stamp .55s var(--ease) forwards;
}

@keyframes about-stamp {
  0%   { transform: rotate(-22deg) scale(1.8); opacity: 0; }
  55%  { opacity: 1; }
  100% { transform: rotate(-6deg) scale(1); opacity: 1; }
}

.about-seal-sec__text {
  font-family: "Zen Old Mincho", serif;
  font-size: clamp(1rem, 1.85vw, 1.25rem);
  font-weight: 500;
  letter-spacing: .14em;
  line-height: 2.4;
  color: var(--sumi);
  max-width: 440px;
  margin: 0 auto clamp(44px, 7vw, 64px);
}

.about-seal-sec__cta {
  display: flex;
  justify-content: center;
  gap: clamp(14px, 2.5vw, 24px);
  flex-wrap: wrap;
}

.about-seal-sec .cta { margin-top: 0; }