:root {
  --parchment: #f5ead8;
  --parchment-dark: #ede0c6;
  --ink: #1a1410;
  --accent: #8b7355;
  --accent-light: #c4a46b;
  --font-serif: 'Noto Serif JP', 'Noto Serif', Georgia, serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  background: var(--parchment);
  color: var(--ink);
  line-height: 1.8;
}

/* ── Navigation ── */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(20, 15, 10, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform 0.35s ease;
}

#nav.hidden {
  transform: translateY(-100%);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--parchment);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
}

.nav-logo-kanji {
  font-size: 1.3rem;
  color: var(--accent-light);
  font-family: 'Noto Serif JP', serif;
  line-height: 1;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: rgba(245, 234, 216, 0.8);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--accent-light);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--parchment);
  transition: all 0.3s;
}

/* ── Hero ── */
#hero {
  position: relative;
  height: 100vh;
  min-height: 520px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

#hero video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.15) 0%,
    rgba(0, 0, 0, 0.35) 45%,
    rgba(0, 0, 0, 0.65) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--parchment);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-kanji {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(5rem, 14vw, 10rem);
  font-weight: 300;
  line-height: 1;
  letter-spacing: 0.12em;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.6);
}

.hero-rule {
  width: 80px;
  height: 1px;
  background: var(--accent-light);
  margin: 1.2rem 0;
  opacity: 0.7;
}

.hero-title {
  font-size: clamp(0.8rem, 2vw, 1.1rem);
  font-weight: 400;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  opacity: 0.85;
}

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.scroll-indicator span {
  display: block;
  width: 18px;
  height: 18px;
  border-right: 1.5px solid rgba(245, 234, 216, 0.6);
  border-bottom: 1.5px solid rgba(245, 234, 216, 0.6);
  transform: rotate(45deg);
  animation: scrollBounce 1.8s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.5; }
  50%       { transform: rotate(45deg) translateY(7px); opacity: 1; }
}

/* ── Layout ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.container-wide {
  max-width: 1380px;
  margin: 0 auto;
  padding: 0 3rem;
}

.parchment {
  background: var(--parchment);
  padding: 90px 0;
}

.parchment-dark {
  background: var(--parchment-dark);
  padding: 90px 0;
}

/* ── Ink dividers ── */
.ink-divider {
  height: 1px;
  background: linear-gradient(
    to right,
    transparent 0%,
    var(--accent) 20%,
    var(--accent) 80%,
    transparent 100%
  );
  opacity: 0.35;
}

/* ── Section headers ── */
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-kanji {
  display: block;
  font-family: 'Noto Serif JP', serif;
  font-size: 0.95rem;
  color: var(--accent);
  letter-spacing: 0.35em;
  margin-bottom: 0.6rem;
}

.section-header h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 400;
  letter-spacing: 0.1em;
}

/* ── Intro / Welcome section ── */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 240px 1fr;
  gap: 3rem;
  align-items: center;
}

.intro-text {
  font-size: 0.92rem;
  line-height: 2.1;
}

.intro-text p {
  margin-bottom: 1.3rem;
}

.intro-text p:last-child {
  margin-bottom: 0;
}

.intro-en {
  text-align: right;
}

.intro-jp {
  text-align: left;
  font-family: 'Noto Serif JP', serif;
}

.intro-closing {
  font-style: italic;
  color: var(--accent);
  margin-top: 0.5rem;
}

.intro-signature {
  margin-top: 1rem;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  opacity: 0.8;
}

.intro-logo {
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-image {
  width: 220px;
  height: 220px;
  background-image: url('../logo.jpg');
  background-size: 100%;
  background-position: 50% 50%;
  background-repeat: no-repeat;
  border-radius: 50%;
  box-shadow: 0 0 0 1px rgba(139, 115, 85, 0.3);
}

/* ── About section ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-text p {
  margin-bottom: 1rem;
  line-height: 1.95;
}

.placeholder-text {
  color: var(--accent);
  font-style: italic;
  border: 1px dashed var(--accent);
  padding: 1.5rem;
  border-radius: 4px;
  opacity: 0.8;
}

.image-placeholder {
  aspect-ratio: 4/3;
  border-radius: 4px;
  background: var(--parchment-dark);
  border: 1px dashed var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  opacity: 0.7;
}

/* ── Shin · Zen · Bi ── */
.szb-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.szb-card {
  text-align: center;
  padding: 2.5rem 2rem;
  background: rgba(255, 255, 255, 0.3);
  border: 1px solid rgba(139, 115, 85, 0.35);
  border-top: 3px solid var(--accent);
}

.szb-kanji {
  font-family: 'Noto Serif JP', serif;
  font-size: 3.5rem;
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 1rem;
}

.szb-card h3 {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  margin-bottom: 0.75rem;
}

.szb-card p {
  font-size: 0.9rem;
  line-height: 1.85;
  color: #4a3f35;
}

/* ── About links ── */
.about-text a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
}

.about-text a:hover {
  color: var(--ink);
}

/* ── Contact details ── */
.contact-details {
  margin-bottom: 1.5rem;
  line-height: 2;
  font-size: 0.95rem;
}

.contact-details a {
  color: var(--ink);
  text-decoration: none;
  transition: color 0.2s;
}

.contact-details a:hover {
  color: var(--accent);
}

/* ── Classes / Schedule ── */
.classes-intro {
  max-width: 620px;
  margin: 0 auto 3rem;
  text-align: center;
  font-size: 1rem;
  line-height: 1.95;
}

.schedule-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  max-width: 560px;
  margin: 0 auto;
}

.schedule-card {
  background: rgba(255, 255, 255, 0.4);
  border: 1px solid rgba(139, 115, 85, 0.4);
  border-top: 3px solid var(--accent);
  padding: 2rem 1.5rem;
  text-align: center;
}

.schedule-day {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  color: var(--ink);
}

.schedule-time {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.schedule-note {
  font-size: 0.82rem;
  color: #888;
  font-style: italic;
}

.schedule-note-main {
  text-align: center;
  margin-top: 2rem;
  color: var(--accent);
  font-size: 0.85rem;
  opacity: 0.8;
}

/* ── Gallery ── */
.gallery-video {
  max-width: 820px;
  margin: 0 auto 3rem;
}

.gallery-video video {
  width: 100%;
  display: block;
  border: 1px solid rgba(139, 115, 85, 0.4);
}

.video-caption {
  text-align: center;
  font-size: 0.82rem;
  color: var(--accent);
  margin-top: 0.75rem;
  letter-spacing: 0.1em;
  font-style: italic;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.photo-placeholder {
  aspect-ratio: 4/3;
  background: var(--parchment-dark);
  border: 1px dashed rgba(139, 115, 85, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  opacity: 0.7;
}

/* ── Contact ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.form-group input,
.form-group textarea {
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(139, 115, 85, 0.5);
  border-radius: 2px;
  padding: 0.75rem 1rem;
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--ink);
  background: rgba(255, 255, 255, 0.7);
}

.form-group textarea {
  resize: vertical;
}

.btn-send {
  align-self: flex-start;
  background: var(--ink);
  color: var(--parchment);
  border: none;
  padding: 0.9rem 2.8rem;
  font-family: var(--font-serif);
  font-size: 0.78rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.25s;
}

.btn-send:hover {
  background: var(--accent);
}

.contact-address {
  line-height: 2;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.map-embed {
  border: 1px solid rgba(139, 115, 85, 0.4);
  overflow: hidden;
}

/* ── Footer links ── */
.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: rgba(245, 234, 216, 0.5);
  text-decoration: none;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent-light);
}

/* ── Responsive: szb ── */
@media (max-width: 768px) {
  .szb-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }
}

/* ── Footer ── */
footer {
  background: var(--ink);
  color: rgba(245, 234, 216, 0.6);
  padding: 2rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}

.footer-kanji {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.1rem;
  color: var(--accent-light);
}

/* ── Scroll animations ── */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* staggered delay for siblings */
.fade-in:nth-child(2) { transition-delay: 0.12s; }
.fade-in:nth-child(3) { transition-delay: 0.24s; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .intro-grid {
    grid-template-columns: 1fr 200px 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(20, 15, 10, 0.96);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }

  .nav-links.open {
    max-height: 280px;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 1rem 2rem;
    border-bottom: 1px solid rgba(245, 234, 216, 0.08);
  }

  .intro-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    text-align: center;
  }

  .intro-en,
  .intro-jp {
    text-align: center;
  }

  .intro-logo {
    order: -1;
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .photo-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .parchment,
  .parchment-dark {
    padding: 60px 0;
  }
}

@media (max-width: 480px) {
  .photo-grid {
    grid-template-columns: 1fr;
  }

  .hero-kanji {
    font-size: clamp(3.5rem, 20vw, 6rem);
  }

  .logo-image {
    width: 180px;
    height: 180px;
  }
}