/* =============================================
   壇 (DAN) — WordPress Theme CSS
   美術紫水
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@200;300;400&family=Shippori+Mincho:wght@400;500&display=swap');

:root {
  --dan-black: #0a0906;
  --dan-deep: #111009;
  --dan-gold: #c9a84c;
  --dan-gold-dim: #8a6f32;
  --dan-gold-faint: #3a2e18;
  --dan-white: #e8e2d8;
  --dan-white-dim: #9a9080;
  --dan-white-faint: #3d3830;
}

/* ── RESET ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--dan-black);
  color: var(--dan-white);
  font-family: 'Noto Serif JP', 'Yu Mincho', 'YuMincho', serif;
  font-weight: 200;
  line-height: 2;
  overflow-x: hidden;
}

/* ── GRAIN OVERLAY ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.6;
}

/* ── NAVIGATION ── */
.dan-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 2rem 4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dan-nav::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, var(--dan-black) 0%, transparent 100%);
  pointer-events: none;
  z-index: -1;
}

.dan-nav__logo {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 1.4rem;
  color: var(--dan-gold);
  letter-spacing: 0.4em;
  text-decoration: none;
}

.dan-nav__links {
  display: flex;
  gap: 3rem;
  list-style: none;
}

.dan-nav__links a {
  color: var(--dan-white-dim);
  text-decoration: none;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  transition: color 0.4s;
}

.dan-nav__links a:hover {
  color: var(--dan-gold);
}

/* ── DIVIDER ── */
.dan-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--dan-gold-faint), transparent);
}

/* ── SECTION BASE ── */
.dan-section {
  padding: 8rem 4rem;
  max-width: 900px;
  margin: 0 auto;
}

.dan-section__label {
  font-size: 0.55rem;
  letter-spacing: 0.6em;
  color: var(--dan-gold-dim);
  margin-bottom: 3rem;
  display: block;
}

/* ── HERO ── */
.dan-hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  padding: 8rem 2rem 6rem;
}

.dan-hero__kanji {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: clamp(8rem, 20vw, 18rem);
  font-weight: 400;
  color: transparent;
  -webkit-text-stroke: 1px var(--dan-gold-dim);
  letter-spacing: 0.1em;
  line-height: 1;
  position: relative;
  opacity: 0;
  animation: danFadeIn 3s ease forwards 0.5s;
}

.dan-hero__kanji::after {
  content: '壇';
  position: absolute;
  inset: 0;
  color: var(--dan-gold);
  opacity: 0.15;
  filter: blur(40px);
}

.dan-hero__tagline {
  font-size: clamp(0.7rem, 1.5vw, 0.85rem);
  color: var(--dan-white-dim);
  letter-spacing: 0.5em;
  margin-top: 3rem;
  opacity: 0;
  animation: danFadeIn 2s ease forwards 2s;
}

.dan-hero__sub {
  font-size: 0.65rem;
  color: var(--dan-gold-dim);
  letter-spacing: 0.4em;
  margin-top: 1rem;
  opacity: 0;
  animation: danFadeIn 2s ease forwards 2.5s;
}

.dan-hero__scroll {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  opacity: 0;
  animation: danFadeIn 2s ease forwards 3.5s;
}

.dan-hero__scroll span {
  font-size: 0.55rem;
  letter-spacing: 0.4em;
  color: var(--dan-white-faint);
}

.dan-hero__scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--dan-gold-dim), transparent);
  animation: danScrollPulse 2s ease-in-out infinite;
}

/* ── ABOUT ── */
.dan-about { max-width: 700px; }

.dan-about__text {
  font-size: clamp(0.9rem, 1.8vw, 1.05rem);
  line-height: 2.6;
  color: var(--dan-white-dim);
  letter-spacing: 0.08em;
}

.dan-about__text em {
  font-style: normal;
  color: var(--dan-white);
}

.dan-about__detail {
  margin-top: 4rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.dan-detail-item {
  border-left: 1px solid var(--dan-gold-faint);
  padding-left: 1.5rem;
}

.dan-detail-item__label {
  font-size: 0.55rem;
  letter-spacing: 0.4em;
  color: var(--dan-gold-dim);
  display: block;
  margin-bottom: 0.5rem;
}

.dan-detail-item__value {
  font-size: 0.85rem;
  color: var(--dan-white-dim);
  letter-spacing: 0.1em;
}

/* ── NEXT ── */
.dan-next { text-align: center; }

.dan-next__number {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: clamp(5rem, 12vw, 9rem);
  color: transparent;
  -webkit-text-stroke: 1px var(--dan-gold-faint);
  line-height: 1;
  margin-bottom: 3rem;
}

.dan-next__theme {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  color: var(--dan-gold);
  letter-spacing: 0.3em;
  margin-bottom: 2rem;
}

.dan-next__info {
  display: flex;
  justify-content: center;
  gap: 4rem;
  margin: 3rem 0;
  flex-wrap: wrap;
}

.dan-next__info-item { text-align: center; }

.dan-next__info-label {
  font-size: 0.5rem;
  letter-spacing: 0.5em;
  color: var(--dan-gold-dim);
  display: block;
  margin-bottom: 0.5rem;
}

.dan-next__info-value {
  font-size: 0.8rem;
  color: var(--dan-white-dim);
  letter-spacing: 0.2em;
}

.dan-next__guest {
  margin: 3rem 0;
  padding: 2.5rem;
  border: 1px solid var(--dan-gold-faint);
  position: relative;
}

.dan-next__guest::before {
  content: 'GUEST';
  position: absolute;
  top: -0.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--dan-black);
  padding: 0 1rem;
  font-size: 0.5rem;
  letter-spacing: 0.5em;
  color: var(--dan-gold-dim);
}

.dan-next__guest-name {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 1.3rem;
  color: var(--dan-white);
  letter-spacing: 0.3em;
  margin-bottom: 1rem;
}

.dan-next__guest-desc {
  font-size: 0.75rem;
  color: var(--dan-white-dim);
  line-height: 2.2;
  letter-spacing: 0.08em;
}

.dan-cta {
  display: inline-block;
  margin-top: 3rem;
  padding: 1rem 3rem;
  border: 1px solid var(--dan-gold-dim);
  color: var(--dan-gold);
  font-family: 'Noto Serif JP', serif;
  font-size: 0.7rem;
  letter-spacing: 0.4em;
  text-decoration: none;
  transition: all 0.4s;
  position: relative;
  overflow: hidden;
  background: transparent;
}

.dan-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--dan-gold);
  transform: translateX(-101%);
  transition: transform 0.4s ease;
  z-index: -1;
}

.dan-cta:hover { color: var(--dan-black); }
.dan-cta:hover::before { transform: translateX(0); }

/* ── ARCHIVE ── */
.dan-archive { max-width: 700px; }

.dan-archive__list {
  list-style: none;
  margin-top: 2rem;
}

.dan-archive__item {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--dan-white-faint);
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 2rem;
  align-items: start;
  opacity: 0.6;
  transition: opacity 0.4s;
}

.dan-archive__item:hover { opacity: 1; }

.dan-archive__number {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 2.5rem;
  color: var(--dan-gold-faint);
  line-height: 1;
}

.dan-archive__date {
  font-size: 0.55rem;
  letter-spacing: 0.3em;
  color: var(--dan-gold-dim);
  margin-bottom: 0.5rem;
  display: block;
}

.dan-archive__theme {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 1.1rem;
  color: var(--dan-white);
  letter-spacing: 0.2em;
  margin-bottom: 0.8rem;
}

.dan-archive__quote {
  font-size: 0.75rem;
  color: var(--dan-white-dim);
  line-height: 2;
  letter-spacing: 0.06em;
  font-style: italic;
}

/* ── PHILOSOPHY ── */
.dan-philosophy {
  text-align: center;
  padding: 10rem 4rem;
}

.dan-philosophy__text {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  color: var(--dan-white-dim);
  line-height: 3;
  letter-spacing: 0.2em;
  max-width: 600px;
  margin: 0 auto;
}

.dan-philosophy__text strong {
  font-weight: 500;
  color: var(--dan-white);
}

/* ── CONTACT ── */
.dan-contact { text-align: center; }

.dan-contact__note {
  font-size: 0.7rem;
  color: var(--dan-white-dim);
  letter-spacing: 0.15em;
  line-height: 2.5;
  margin-bottom: 3rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.dan-contact__email {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 0.9rem;
  color: var(--dan-gold);
  letter-spacing: 0.2em;
  text-decoration: none;
  border-bottom: 1px solid var(--dan-gold-faint);
  padding-bottom: 0.3rem;
  transition: border-color 0.4s;
}

.dan-contact__email:hover { border-color: var(--dan-gold); }

/* ── FOOTER ── */
.dan-footer {
  padding: 4rem;
  text-align: center;
  border-top: 1px solid var(--dan-white-faint);
}

.dan-footer__logo {
  font-family: 'Shippori Mincho', 'Yu Mincho', serif;
  font-size: 2rem;
  color: var(--dan-gold-dim);
  display: block;
  margin-bottom: 1.5rem;
  letter-spacing: 0.5em;
}

.dan-footer__info {
  font-size: 0.55rem;
  color: var(--dan-white-faint);
  letter-spacing: 0.3em;
  line-height: 2.5;
}

.dan-footer__org {
  margin-top: 1.5rem;
  font-size: 0.5rem;
  color: var(--dan-white-faint);
  letter-spacing: 0.2em;
  opacity: 0.5;
}

/* ── SCROLL REVEAL ── */
.dan-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

.dan-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── ANIMATIONS ── */
@keyframes danFadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes danScrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50%       { opacity: 1;   transform: scaleY(1.2); }
}

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .dan-nav { padding: 1.5rem 2rem; }
  .dan-nav__links { display: none; }
  .dan-section { padding: 5rem 2rem; }
  .dan-about__detail { grid-template-columns: 1fr; }
  .dan-next__info { gap: 2rem; }
  .dan-archive__item { grid-template-columns: 80px 1fr; }
  .dan-footer { padding: 3rem 2rem; }
  .dan-philosophy { padding: 6rem 2rem; }
}