:root {
  --paper: #f5f2eb;
  --ink: #1a1a1a;
  --accent: #c4a77d;
  --accent-dark: #8b7355;
  --grey: #4a4a4a;
  --grey-light: #e0dcd4;
  --error: #c62828;
  --success: #2e7d32;
  --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1a1a1a;
    --ink: #f5f2eb;
    --grey: #c0c0c0;
    --grey-light: #2a2a2a;
    --accent: #d4b78d;
    --accent-dark: #c4a77d;
    --error: #ef5350;
  }
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}

body {
  font-family: 'Heebo', sans-serif;
  font-size: clamp(1rem, 2.5vw, 1.125rem);
  line-height: 1.7;
  color: var(--ink);
  background-color: var(--paper);
  overflow-x: hidden;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  inset-inline-start: 1rem;
  background: var(--ink);
  color: var(--paper);
  padding: 0.75rem 1.5rem;
  z-index: 10000;
  text-decoration: none;
  font-weight: 700;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 1rem;
}

/* Custom cursor */
.cursor-follower {
  position: fixed;
  width: 20px;
  height: 20px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: transform 0.15s var(--transition-smooth), 
              width 0.2s var(--transition-smooth), 
              height 0.2s var(--transition-smooth),
              opacity 0.2s;
  opacity: 0;
}

.cursor-follower.active {
  opacity: 1;
}

.cursor-follower.hover {
  width: 50px;
  height: 50px;
  border-color: var(--ink);
}

@media (pointer: coarse) {
  .cursor-follower {
    display: none;
  }
}

/* Typography */
h1, h2, h3 {
  font-family: 'Frank Ruhl Libre', serif;
  font-weight: 700;
  line-height: 1.1;
}

/* Japanese text */
[lang="ja"],
.kanji-overlay {
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic Pro', 'Yu Gothic', sans-serif;
}

/* Navigation */
.main-nav {
  position: fixed;
  top: 0;
  inset-inline: 0;
  z-index: 1000;
  padding: 1.5rem 2rem;
  transition: background-color 0.3s, backdrop-filter 0.3s;
}

.main-nav.scrolled {
  background-color: rgba(245, 242, 235, 0.95);
  backdrop-filter: blur(10px);
}

@media (prefers-color-scheme: dark) {
  .main-nav.scrolled {
    background-color: rgba(26, 26, 26, 0.95);
  }
}

.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  font-size: 1.1rem;
}

.logo-mark {
  width: 40px;
  height: 40px;
}

.logo-line {
  transform-origin: center;
  transition: transform 0.3s var(--transition-smooth);
}

.nav-logo:hover .logo-line {
  transform: scaleY(0.7);
}

.logo-flow {
  transition: d 0.3s var(--transition-smooth);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

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

.nav-links a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.95rem;
  position: relative;
  padding: 0.25rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  inset-inline-start: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s var(--transition-smooth);
}

.nav-links a:hover::after,
.nav-links a:focus::after {
  width: 100%;
}

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

  .nav-links {
    position: fixed;
    top: 0;
    inset-inline-start: 100%;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    background: var(--paper);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transition: inset-inline-start 0.4s var(--transition-smooth);
  }

  .nav-links.open {
    inset-inline-start: 0;
  }

  .nav-links a {
    font-size: 1.5rem;
  }
}

/* Hero */
.hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 6rem 2rem 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.enso {
  position: absolute;
  top: 50%;
  inset-inline-start: 50%;
  transform: translateX(50%) translateY(-50%);
  width: min(80vw, 600px);
  height: min(80vw, 600px);
  opacity: 0.08;
}

[dir="rtl"] .enso {
  transform: translateX(50%) translateY(-50%);
}

[dir="ltr"] .enso {
  transform: translateX(-50%) translateY(-50%);
}

.enso-circle {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: draw-enso 3s var(--transition-smooth) forwards;
}

@keyframes draw-enso {
  to {
    stroke-dashoffset: 0;
  }
}

.energy-lines {
  position: absolute;
  bottom: 20%;
  inset-inline: 0;
  height: 200px;
  opacity: 0.05;
}

.flow-line {
  fill: none;
  stroke: var(--ink);
  stroke-width: 0.3;
}

.hero-content {
  text-align: center;
  z-index: 1;
}

.hero-tag {
  font-size: 0.875rem;
  color: var(--grey);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.hero-title {
  font-size: clamp(2.5rem, 9vw, 5.5rem);
  margin-bottom: 1.5rem;
  line-height: 1.05;
}

.hero-title .title-main {
  display: block;
}

.hero-title em {
  display: block;
  color: var(--accent-dark);
  font-style: italic;
  font-size: 0.85em;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: var(--grey);
  margin-bottom: 3rem;
  font-weight: 300;
  max-width: 500px;
  margin-inline: auto;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  padding: 1rem 2rem;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.cta-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-dark);
  transform: scaleX(0);
  transform-origin: inline-end;
  transition: transform 0.4s var(--transition-smooth);
}

.cta-btn:hover::before,
.cta-btn:focus::before {
  transform: scaleX(1);
  transform-origin: inline-start;
}

.cta-btn span,
.cta-btn svg {
  position: relative;
  z-index: 1;
}

.cta-arrow {
  width: 20px;
  height: 20px;
  transition: transform 0.3s var(--transition-smooth);
}

.cta-btn:hover .cta-arrow,
.cta-btn:focus .cta-arrow {
  transform: translateX(-5px);
}

[dir="rtl"] .cta-btn:hover .cta-arrow,
[dir="rtl"] .cta-btn:focus .cta-arrow {
  transform: translateX(5px);
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  inset-inline-start: 50%;
  transform: translateX(50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--grey);
  font-size: 0.75rem;
}

[dir="rtl"] .scroll-hint {
  transform: translateX(50%);
}

[dir="ltr"] .scroll-hint {
  transform: translateX(-50%);
}

.scroll-hint svg {
  width: 20px;
  height: 35px;
}

.scroll-dot {
  animation: scroll-bounce 2s infinite;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(8px); opacity: 0.3; }
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--transition-smooth), 
              transform 0.8s var(--transition-smooth);
}

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

/* Sections common */
.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(3rem, 8vw, 6rem) clamp(1rem, 4vw, 2rem);
}

.section-title {
  font-size: clamp(1.75rem, 5vw, 3rem);
  margin-bottom: 2rem;
}

.section-title--center {
  text-align: center;
}

/* About */
.about {
  background: var(--grey-light);
}

.about .section-inner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 4rem;
  align-items: center;
}

@media (max-width: 900px) {
  .about .section-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

.about-visual {
  display: flex;
  justify-content: center;
}

.circle-composition {
  position: relative;
  width: min(100%, 300px);
  aspect-ratio: 1;
}

.composition-svg {
  width: 100%;
  height: 100%;
}

.comp-circle {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1;
  transform-origin: center;
}

.c1 { animation: rotate-slow 30s linear infinite; }
.c2 { animation: rotate-slow 20s linear infinite reverse; }
.c3 { animation: pulse 4s ease-in-out infinite; }

@keyframes rotate-slow {
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { r: 40; opacity: 1; }
  50% { r: 45; opacity: 0.7; }
}

.comp-line {
  stroke: var(--accent);
  stroke-width: 0.5;
  opacity: 0.5;
}

.kanji-overlay {
  position: absolute;
  top: 50%;
  inset-inline-start: 50%;
  transform: translate(50%, -50%);
  font-size: 3.5rem;
  color: var(--ink);
  opacity: 0.1;
  pointer-events: none;
  letter-spacing: 0.1em;
}

[dir="rtl"] .kanji-overlay {
  transform: translate(50%, -50%);
}

[dir="ltr"] .kanji-overlay {
  transform: translate(-50%, -50%);
}

.about-text {
  max-width: 55ch;
}

.about-text p {
  margin-bottom: 1.25rem;
  color: var(--grey);
}

.about-text .lead {
  font-size: 1.1rem;
  color: var(--ink);
  font-weight: 500;
}

/* Philosophy */
.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 4rem;
}

@media (max-width: 900px) {
  .principles {
    grid-template-columns: 1fr;
    max-width: 450px;
    margin-inline: auto;
  }
}

.principle {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--paper);
  border: 1px solid var(--grey-light);
  transition: transform 0.3s var(--transition-smooth), 
              box-shadow 0.3s var(--transition-smooth);
}

.principle--featured {
  border-color: var(--accent);
  border-width: 2px;
}

@media (min-width: 901px) {
  .principle--featured {
    transform: scale(1.05);
  }
  
  .principle--featured:hover {
    transform: scale(1.08) translateY(-5px);
  }
}

.principle:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.principle-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 1.25rem;
}

.principle-icon svg {
  width: 100%;
  height: 100%;
  color: var(--ink);
}

.breathing-dot {
  animation: breathe 3s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { r: 8; opacity: 1; }
  50% { r: 10; opacity: 0.6; }
}

.wave-path {
  stroke-dasharray: 100;
  animation: wave 3s ease-in-out infinite;
}

@keyframes wave {
  0%, 100% { stroke-dashoffset: 0; }
  50% { stroke-dashoffset: 50; }
}

.rotating-circle {
  transform-origin: center;
  animation: rotate-slow 8s linear infinite;
}

.principle h3 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
  color: var(--accent-dark);
}

.principle h3 [lang="ja"] {
  font-weight: 400;
}

.principle p {
  color: var(--grey);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Quote */
.quote-section {
  background: var(--ink);
  color: var(--paper);
}

.main-quote {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.main-quote blockquote p {
  font-family: 'Frank Ruhl Libre', serif;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  line-height: 1.4;
  margin-bottom: 1.5rem;
}

.main-quote figcaption {
  font-size: 0.9rem;
  color: var(--accent);
}

/* Schedule */
.schedule-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

@media (min-width: 1100px) {
  .schedule-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 600px) {
  .schedule-grid {
    grid-template-columns: 1fr;
  }
}

.schedule-card {
  background: var(--paper);
  border: 1px solid var(--grey-light);
  padding: 1.5rem;
  transition: border-color 0.3s, transform 0.3s var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.schedule-card::before {
  content: '';
  position: absolute;
  top: 0;
  inset-inline-start: 0;
  width: 4px;
  height: 0;
  background: var(--accent);
  transition: height 0.4s var(--transition-smooth);
}

.schedule-card:hover {
  border-color: var(--accent);
}

.schedule-card:hover::before {
  height: 100%;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.day {
  font-weight: 700;
  font-size: 1rem;
}

.level {
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: 20px;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.level-icon {
  font-size: 0.5rem;
}

.level--beginner {
  background: rgba(46, 125, 50, 0.15);
  color: #2e7d32;
}

.level--all {
  background: rgba(21, 101, 192, 0.15);
  color: #1565c0;
}

.level--advanced {
  background: rgba(194, 24, 91, 0.15);
  color: #c2185b;
}

@media (prefers-color-scheme: dark) {
  .level--beginner {
    background: rgba(76, 175, 80, 0.2);
    color: #81c784;
  }
  
  .level--all {
    background: rgba(66, 165, 245, 0.2);
    color: #64b5f6;
  }
  
  .level--advanced {
    background: rgba(240, 98, 146, 0.2);
    color: #f48fb1;
  }
}

.card-time {
  font-size: 1.25rem;
  font-weight: 700;
  font-family: 'Frank Ruhl Libre', serif;
  margin-bottom: 0.5rem;
  transition: color 0.3s;
}

.schedule-card:hover .card-time {
  color: var(--accent-dark);
}

.card-desc {
  color: var(--grey);
  font-size: 0.85rem;
}

.schedule-note {
  text-align: center;
  margin-top: 2.5rem;
  color: var(--grey);
  font-size: 0.9rem;
}

/* Contact */
.contact {
  background: var(--grey-light);
}

.contact .section-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 4rem;
  align-items: start;
}

@media (max-width: 900px) {
  .contact .section-inner {
    grid-template-columns: 1fr;
  }

  .contact-visual {
    order: -1;
    max-width: 300px;
    margin: 0 auto;
  }
}

.contact-content > p {
  color: var(--grey);
  margin-bottom: 2rem;
  max-width: 50ch;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2.5rem;
  font-style: normal;
}

.info-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.info-item svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

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

.info-item a:hover,
.info-item a:focus {
  color: var(--accent-dark);
  text-decoration: underline;
}

.placeholder {
  color: var(--grey);
  font-style: italic;
  font-size: 0.9em;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-width: 500px;
}

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

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
}

.required {
  color: var(--error);
}

.form-group input,
.form-group textarea {
  padding: 0.875rem 1rem;
  border: 1px solid var(--grey-light);
  background: var(--paper);
  font-family: inherit;
  font-size: 1rem;
  color: var(--ink);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(196, 167, 125, 0.25);
}

.form-group input.error,
.form-group textarea.error {
  border-color: var(--error);
}

.form-group input.error:focus,
.form-group textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(198, 40, 40, 0.2);
}

.error-message {
  font-size: 0.8rem;
  color: var(--error);
  min-height: 1.1em;
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-family: inherit;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.2s var(--transition-smooth);
  align-self: flex-start;
}

.submit-btn:hover,
.submit-btn:focus {
  background: var(--accent-dark);
}

.submit-btn:active {
  transform: scale(0.98);
}

.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.submit-btn svg {
  width: 18px;
  height: 18px;
  transition: transform 0.3s;
}

.submit-btn:hover svg,
.submit-btn:focus svg {
  transform: translate(3px, -3px);
}

[dir="rtl"] .submit-btn:hover svg,
[dir="rtl"] .submit-btn:focus svg {
  transform: translate(-3px, -3px);
}

.submit-btn.success {
  background: var(--success);
}

.form-status {
  font-size: 0.875rem;
  min-height: 1.25em;
}

.form-status:empty {
  display: none;
}

.contact-visual {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding-top: 2rem;
}

.contact-art {
  width: min(100%, 350px);
  height: auto;
}

.orbit {
  transform-origin: center;
}

.o1 { animation: rotate-slow 25s linear infinite; }
.o2 { animation: rotate-slow 18s linear infinite reverse; }
.o3 { animation: rotate-slow 12s linear infinite; }

.orbiting-dot {
  transform-origin: 200px 200px;
}

.d1 { animation: orbit1 15s linear infinite; }
.d2 { animation: orbit2 12s linear infinite reverse; }
.d3 { animation: orbit3 8s linear infinite; }

@keyframes orbit1 {
  to { transform: rotate(360deg); }
}

@keyframes orbit2 {
  to { transform: rotate(-360deg); }
}

@keyframes orbit3 {
  to { transform: rotate(360deg); }
}

/* Footer */
.main-footer {
  background: var(--ink);
  color: var(--paper);
  padding: 2rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-logo {
  width: 32px;
  height: 32px;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--grey);
}

/* Focus styles */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--accent-dark);
  outline-offset: 2px;
}

/* Selection */
::selection {
  background: var(--accent);
  color: var(--paper);
}