/* ============ ベース ============ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.9;
  letter-spacing: 0.04em;
  color: var(--text-on-ink);
  background: var(--ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection {
  background: var(--gold);
  color: var(--ink);
}

a {
  color: inherit;
  text-decoration: none;
}

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

h1, h2, h3 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.35;
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}

@media (pointer: fine) {
  a, button, [data-magnetic] {
    cursor: none;
  }
}

/* ============ ローディング ============ */
.loader {
  position: fixed;
  inset: 0;
  z-index: var(--z-loader);
  display: grid;
  place-items: center;
  background: var(--ink);
  transition: clip-path 900ms var(--ease-in-out-soft);
  clip-path: inset(0 0 0 0);
}

.loader.is-done {
  clip-path: inset(0 0 100% 0);
  pointer-events: none;
}

.loader__mark {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.loader__kanji {
  font-family: var(--font-heading);
  font-size: clamp(4rem, 12vw, 7rem);
  color: var(--washi);
  opacity: 0;
  transform: translateY(0.3em) scale(0.96);
  animation: loaderKanji 1100ms var(--ease-out-expo) 120ms forwards;
}

.loader__line {
  width: 1px;
  height: 56px;
  background: var(--gold);
  transform: scaleY(0);
  transform-origin: top;
  animation: loaderLine 900ms var(--ease-in-out-soft) 400ms forwards;
}

.loader__count {
  font-family: var(--font-latin);
  font-size: 0.875rem;
  letter-spacing: 0.35em;
  color: var(--text-on-ink-dim);
  font-variant-numeric: tabular-nums;
}

@keyframes loaderKanji {
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes loaderLine {
  to { transform: scaleY(1); }
}

/* ============ カスタムカーソル ============ */
.cursor {
  position: fixed;
  inset: 0;
  z-index: var(--z-cursor);
  pointer-events: none;
  display: none;
}

@media (pointer: fine) {
  .cursor { display: block; }
}

.cursor__dot,
.cursor__ring {
  position: absolute;
  top: 0;
  left: 0;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  will-change: transform;
}

.cursor__dot {
  width: 6px;
  height: 6px;
  background: var(--gold);
}

.cursor__ring {
  width: 38px;
  height: 38px;
  border: 1px solid rgba(201, 168, 106, 0.5);
  transition: width var(--duration-normal) var(--ease-out-expo),
              height var(--duration-normal) var(--ease-out-expo),
              opacity var(--duration-normal) ease;
}

.cursor.is-hover .cursor__ring {
  width: 64px;
  height: 64px;
  opacity: 0.9;
}

/* ============ ヘッダー ============ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem var(--space-gutter);
  transition: transform 500ms var(--ease-out-expo),
              background-color 400ms ease;
}

.header.is-scrolled {
  background: rgba(13, 11, 9, 0.72);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.header.is-hidden {
  transform: translateY(-100%);
}

.header__brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.header__brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--ink);
  background: var(--washi);
  border-radius: 50%;
  transition: background-color var(--duration-normal) ease,
              transform var(--duration-normal) var(--ease-spring);
}

.header__brand:hover .header__brand-mark {
  background: var(--gold);
  transform: rotate(-8deg);
}

.header__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.4;
}

.header__brand-ja {
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  letter-spacing: 0.12em;
}

.header__brand-en {
  font-family: var(--font-latin);
  font-size: 0.5625rem;
  letter-spacing: 0.42em;
  color: var(--text-on-ink-dim);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}

.header__link {
  position: relative;
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  padding: 0.5rem 0;
}

.header__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0.2rem;
  width: 100%;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.header__link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header__cta {
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  padding: 0.65rem 1.6rem;
  border: 1px solid var(--line-on-ink);
  border-radius: 999px;
  transition: background-color var(--duration-normal) ease,
              color var(--duration-normal) ease,
              border-color var(--duration-normal) ease;
}

.header__cta:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}

.header__menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 7px;
  width: 48px;
  height: 48px;
  padding: 12px;
  background: none;
  border: 1px solid var(--line-on-ink);
  border-radius: 50%;
}

.header__menu-btn span {
  display: block;
  height: 1px;
  background: var(--text-on-ink);
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.header__menu-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.header__menu-btn[aria-expanded="true"] span:nth-child(2) {
  transform: translateY(-4px) rotate(-45deg);
}

@media (max-width: 860px) {
  .header__nav { display: none; }
  .header__menu-btn { display: flex; }
  .header__brand-ja { font-size: 0.875rem; }
}

/* ============ フルスクリーンメニュー ============ */
.menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  display: grid;
  place-content: center;
  gap: 3rem;
  visibility: hidden;
  pointer-events: none;
}

.menu.is-open {
  visibility: visible;
  pointer-events: auto;
}

.menu__bg {
  position: absolute;
  inset: 0;
  background: rgba(13, 11, 9, 0.92);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  opacity: 0;
  transition: opacity 500ms ease;
}

.menu.is-open .menu__bg {
  opacity: 1;
}

.menu__nav {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.menu__link {
  display: flex;
  align-items: baseline;
  gap: 1.2rem;
  padding: 0.55rem 0;
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 600ms var(--ease-out-expo),
              transform 600ms var(--ease-out-expo);
}

.menu.is-open .menu__link {
  opacity: 1;
  transform: translateY(0);
}

.menu.is-open .menu__link:nth-child(1) { transition-delay: 120ms; }
.menu.is-open .menu__link:nth-child(2) { transition-delay: 190ms; }
.menu.is-open .menu__link:nth-child(3) { transition-delay: 260ms; }
.menu.is-open .menu__link:nth-child(4) { transition-delay: 330ms; }
.menu.is-open .menu__link:nth-child(5) { transition-delay: 400ms; }

.menu__num {
  font-family: var(--font-latin);
  font-size: 0.8125rem;
  letter-spacing: 0.3em;
  color: var(--gold);
}

.menu__text {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 6vw, 2.6rem);
  letter-spacing: 0.08em;
  transition: color var(--duration-normal) ease;
}

.menu__link:hover .menu__text {
  color: var(--gold);
}

.menu__tagline {
  position: relative;
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  letter-spacing: 0.3em;
  color: var(--text-on-ink-dim);
  text-align: center;
  opacity: 0;
  transition: opacity 700ms ease 500ms;
}

.menu.is-open .menu__tagline {
  opacity: 1;
}

/* ============ フッター ============ */
.footer {
  padding: 4rem var(--space-gutter) 2.5rem;
  background: var(--ink);
  border-top: 1px solid var(--line-on-ink);
}

.footer__top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 3rem;
}

.footer__brand {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  letter-spacing: 0.12em;
}

.footer__tagline {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.3em;
  color: var(--gold);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  font-family: var(--font-latin);
  font-size: var(--text-xs);
  letter-spacing: 0.25em;
  color: var(--text-on-ink-dim);
}

/* ============ Reduced Motion ============ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .cursor { display: none; }
}