:root {
  --ink: #0d0d0e;
  --ink-soft: #1a1a1c;
  --paper: #f5efe1;
  --paper-soft: #ece5d4;
  --akane: #b8323a;
  --akane-deep: #8a1f26;
  --kinpaku: #b08d57;
  --ishi: #6b6862;
  --mizu: #2a3a4a;
  --line: rgba(13, 13, 14, 0.12);
  --line-soft: rgba(13, 13, 14, 0.06);
  --shadow-soft: 0 10px 30px -10px rgba(13, 13, 14, 0.18);
  --shadow-hard: 0 20px 50px -20px rgba(13, 13, 14, 0.4);

  --font-display: 'Cinzel', 'Noto Serif JP', Georgia, serif;
  --font-jp: 'Noto Serif JP', 'Yu Mincho', 'Hiragino Mincho Pro', serif;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;

  --container: 1200px;
  --radius: 2px;
  --transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(15px, 0.95vw + 0.5rem, 17px);
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  background-image:
    radial-gradient(circle at 20% 0%, rgba(176, 141, 87, 0.06), transparent 40%),
    radial-gradient(circle at 80% 100%, rgba(184, 50, 58, 0.04), transparent 40%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

a:hover,
a:focus-visible {
  color: var(--akane);
}

button {
  font: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--akane);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 1rem;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 1rem;
  z-index: 100;
  transition: top var(--transition);
}

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

.container {
  width: min(100% - 2.5rem, var(--container));
  margin-inline: auto;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms ease;
}

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(245, 239, 225, 0.85);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition);
}

.site-header.is-scrolled {
  background: rgba(245, 239, 225, 0.95);
  border-bottom-color: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  color: var(--ink);
}

.brand-img {
  display: block;
  height: 36px;
  width: auto;
  transition: transform var(--transition), filter var(--transition);
}

.brand:hover .brand-img,
.brand:focus-visible .brand-img {
  transform: scale(1.03);
  filter: drop-shadow(0 0 0.5rem rgba(184, 50, 58, 0.25));
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  position: relative;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding-block: 0.5rem;
}

.site-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.25rem;
  height: 1px;
  background: var(--akane);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  padding: 0.5rem;
  border-radius: var(--radius);
  width: 42px;
  height: 42px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

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

.nav-toggle[aria-expanded='true'] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 8rem;
  padding-bottom: 6rem;
  overflow: hidden;
}

.hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-jp);
  font-size: 0.9rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--akane);
  margin: 0 0 1.5rem;
}

.eyebrow span[lang='ja'] {
  font-size: 1.3rem;
  letter-spacing: 0;
  color: var(--kinpaku);
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.4rem, 5.5vw, 4.5rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 1.5rem;
  color: var(--ink);
}

.hero-title em {
  font-style: normal;
  color: var(--akane);
  position: relative;
  white-space: nowrap;
}

.hero-title em::after {
  content: '';
  position: absolute;
  left: 4%;
  right: 4%;
  bottom: -0.1em;
  height: 0.18em;
  background: var(--akane);
  opacity: 0.18;
  border-radius: 50%;
}

.hero-lead {
  max-width: 38rem;
  margin: 0 auto 2.5rem;
  font-size: clamp(1rem, 0.4vw + 0.9rem, 1.15rem);
  color: var(--ishi);
}

.hero-cta {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.95rem 1.75rem;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background var(--transition), color var(--transition),
    border-color var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--akane);
  color: var(--paper);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--akane-deep);
  color: var(--paper);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

.hero-enso {
  position: absolute;
  top: 50%;
  right: -20%;
  transform: translateY(-50%);
  pointer-events: none;
  z-index: 1;
  opacity: 0.9;
  filter: drop-shadow(0 10px 30px rgba(184, 50, 58, 0.15));
}

.hero-enso img {
  display: block;
  width: clamp(220px, 26vw, 320px);
  height: auto;
}

.hero-divider {
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 1px;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--ink) 50%, transparent);
  opacity: 0.4;
}

section {
  padding-block: clamp(5rem, 10vw, 8rem);
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 44rem;
  margin: 0 auto 4rem;
}

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-jp);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--akane);
  margin: 0 0 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.9rem, 3.5vw, 2.8rem);
  line-height: 1.15;
  margin: 0 0 1.25rem;
  color: var(--ink);
}

.section-title .jp {
  font-family: var(--font-jp);
  font-weight: 700;
  color: var(--akane);
  font-size: 0.9em;
}

.section-lead {
  font-size: 1.05rem;
  color: var(--ishi);
  margin: 0;
}

.bushido {
  background: var(--paper);
  position: relative;
}

.bushido::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 4rem,
    rgba(13, 13, 14, 0.02) 4rem,
    rgba(13, 13, 14, 0.02) 4rem + 1px
  );
  pointer-events: none;
}

.principles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  counter-reset: principle;
}

.principle {
  position: relative;
  padding: 2.25rem 1.75rem 2rem;
  background: rgba(255, 255, 255, 0.4);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform var(--transition), border-color var(--transition),
    background var(--transition), box-shadow var(--transition);
}

.principle:hover {
  transform: translateY(-4px);
  border-color: var(--akane);
  background: rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow-soft);
}

.principle-kanji {
  font-family: var(--font-jp);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--akane);
  margin-bottom: 1rem;
  opacity: 0.9;
}

.principle h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
  letter-spacing: 0.02em;
}

.principle p {
  margin: 0;
  color: var(--ishi);
  font-size: 0.95rem;
  line-height: 1.6;
}

.principle code {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 0.85em;
  background: rgba(13, 13, 14, 0.06);
  padding: 0.1em 0.35em;
  border-radius: 2px;
  color: var(--akane-deep);
}

.services {
  background: var(--ink);
  color: var(--paper);
}

.services::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 0% 0%, rgba(184, 50, 58, 0.12), transparent 50%),
    radial-gradient(circle at 100% 100%, rgba(176, 141, 87, 0.08), transparent 50%);
  pointer-events: none;
}

.services .section-eyebrow {
  color: var(--akane);
}

.services .section-title {
  color: var(--paper);
}

.services .section-lead {
  color: rgba(245, 239, 225, 0.7);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  position: relative;
  z-index: 1;
}

.service-card {
  padding: 2.25rem 1.75rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(245, 239, 225, 0.1);
  border-radius: var(--radius);
  transition: transform var(--transition), border-color var(--transition),
    background var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--akane);
  background: rgba(255, 255, 255, 0.05);
}

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin-bottom: 1.25rem;
  color: var(--akane);
  border: 1px solid rgba(184, 50, 58, 0.4);
  border-radius: var(--radius);
  background: rgba(184, 50, 58, 0.06);
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
  color: var(--paper);
}

.service-card p {
  margin: 0;
  color: rgba(245, 239, 225, 0.7);
  font-size: 0.95rem;
  line-height: 1.6;
}

.path {
  background: var(--paper-soft);
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem 2.5rem;
  counter-reset: path;
}

.path-item {
  position: relative;
  padding: 1.75rem 1.5rem 1.75rem 0;
  border-top: 1px solid var(--line);
}

.path-num {
  display: block;
  font-family: var(--font-jp);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--akane);
  margin-bottom: 0.75rem;
}

.path-item h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--ink);
}

.path-item p {
  margin: 0;
  color: var(--ishi);
  font-size: 0.95rem;
  line-height: 1.6;
}

.contact {
  background: var(--paper);
  padding-bottom: clamp(4rem, 8vw, 6rem);
}

.contact-inner {
  max-width: 640px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 3rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ishi);
}

.form-field input,
.form-field textarea {
  font: inherit;
  font-size: 1rem;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  padding: 0.85rem 1rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-bottom: 1px solid var(--ink);
  border-radius: var(--radius);
  color: var(--ink);
  transition: border-color var(--transition), background var(--transition);
  font-family: var(--font-body);
  resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--akane);
  background: rgba(255, 255, 255, 0.5);
}

.form-field input:invalid:not(:placeholder-shown),
.form-field textarea:invalid:not(:placeholder-shown) {
  border-color: var(--akane);
}

.form-status {
  margin: 0;
  font-size: 0.9rem;
  color: var(--akane-deep);
  min-height: 1.2em;
}

.contact-meta {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  justify-content: center;
  border-top: 1px solid var(--line);
  padding-top: 2rem;
}

.contact-meta li {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.meta-label {
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--ishi);
}

.contact-meta a {
  font-weight: 500;
  color: var(--ink);
}

.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding-block: 2.5rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer-mark {
  display: inline-flex;
  align-items: center;
  margin: 0;
}

.footer-logo {
  display: block;
  height: 40px;
  width: auto;
  transition: opacity var(--transition);
}

.footer-logo:hover {
  opacity: 0.85;
}

.footer-copy {
  margin: 0;
  font-size: 0.85rem;
  color: rgba(245, 239, 225, 0.6);
}

.hero-watermark {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-jp);
  font-weight: 700;
  font-size: clamp(8rem, 16vw, 16rem);
  line-height: 1;
  color: var(--akane);
  opacity: 0.06;
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
  z-index: 0;
  letter-spacing: 0.08em;
  text-shadow: 0 0 0 currentColor;
}

.kanji-rail {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  font-family: var(--font-jp);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 1.2rem;
  color: var(--akane);
  opacity: 0.18;
  writing-mode: vertical-rl;
  text-orientation: upright;
  pointer-events: none;
  user-select: none;
}

.kanji-rail--left {
  left: 1.25rem;
}

.kanji-rail--right {
  right: 1.25rem;
}

.katana-divider {
  display: flex;
  justify-content: center;
  align-items: center;
  padding-block: clamp(2rem, 5vw, 3.5rem);
  color: var(--akane);
  background: linear-gradient(
    to bottom,
    var(--paper) 0%,
    var(--paper) 40%,
    var(--paper-soft) 50%,
    var(--paper) 60%,
    var(--paper) 100%
  );
  position: relative;
}

.katana-divider::before,
.katana-divider::after {
  content: '';
  position: absolute;
  left: 50%;
  width: 1px;
  height: 30px;
  background: var(--ink);
  opacity: 0.4;
  transform: translateX(-50%);
}

.katana-divider::before {
  top: 0;
}

.katana-divider::after {
  bottom: 0;
}

.katana-divider svg {
  position: relative;
  z-index: 1;
}

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

  .site-nav {
    position: fixed;
    inset: 0;
    background: var(--paper);
    padding: 6rem 2rem 2rem;
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 40;
  }

  .site-nav.is-open {
    transform: translateX(0);
  }

  .site-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }

  .site-nav a {
    font-family: var(--font-display);
    font-size: 1.5rem;
  }

  .hero {
    min-height: auto;
    padding-top: 7rem;
    padding-bottom: 4rem;
  }

  .hero-enso {
    right: -40%;
    opacity: 0.25;
  }

  .brand-img {
    height: 30px;
  }

  .kanji-rail {
    display: none;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title br {
    display: none;
  }

  .section-header {
    margin-bottom: 3rem;
  }

  .hero-watermark {
    font-size: 12rem;
    opacity: 0.04;
  }
}

@media (min-width: 769px) and (max-width: 1100px) {
  .kanji-rail {
    opacity: 0.1;
  }
}