/* ================================================================
   BASE
   ================================================================ */
:root {
  --cream: #F4EEDF;
  --paper: #FAF4E6;
  --white: #FBF7EE;
  --hairline: #DDC9A1;
  --hairline-soft: rgba(43,31,20,.10);
  --ink: #2A2218;
  --ink-soft: #3D3324;
  --walnut: #5C4A2E;
  --walnut-2: #7C6A4C;
  --muted: #A89570;
  --green: #4A5640;
  --green-deep: #36402E;
  --dark: #1B130A;
  --warm: #3B2B19;
  --serif: "Shippori Mincho", "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  --maxw: 430px;
  --pad: 30px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
}
body {
  font-family: var(--sans);
  background: #0A0604;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  font-feature-settings: "palt";
}
body.is-menu-open { overflow: hidden; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
button {
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--hairline);
  outline-offset: 4px;
}

.page {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  overflow-x: hidden;
  background: var(--cream);
}

/* ================================================================
   NAV
   ================================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--maxw);
  padding: 16px 18px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, rgba(15,10,5,.55) 0%, rgba(15,10,5,0) 100%);
  transition: background .45s ease, padding .25s ease;
}
.nav.is-solid,
.nav.is-menu-open {
  padding: 11px 18px;
  background: rgba(244,238,223,.92);
  box-shadow: 0 1px 0 rgba(43,31,20,.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.nav__logo { display: block; }
.nav__logo img {
  width: auto;
  height: 26px;
  filter: brightness(0) invert(1) drop-shadow(0 1px 3px rgba(0,0,0,.3));
  transition: filter .45s ease;
}
.nav.is-solid .nav__logo img,
.nav.is-menu-open .nav__logo img {
  filter: none;
}
.nav__right {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav__menu {
  position: relative;
  display: flex;
  width: 36px;
  height: 36px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: 999px;
}
.nav__menu span {
  display: block;
  width: 20px;
  height: 1px;
  background: var(--white);
  transition: background .45s ease, transform .35s ease;
}
.nav.is-solid .nav__menu span,
.nav.is-menu-open .nav__menu span {
  background: var(--ink);
}
.nav__menu.is-open span:first-child {
  transform: translateY(3.5px) rotate(36deg);
}
.nav__menu.is-open span:last-child {
  transform: translateY(-3.5px) rotate(-36deg);
}

.nav-drawer {
  position: fixed;
  inset: 0;
  left: 50%;
  z-index: 55;
  width: 100%;
  max-width: var(--maxw);
  transform: translateX(-50%);
  background: rgba(244,238,223,.96);
  opacity: 0;
  pointer-events: none;
  transition: opacity .4s ease;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.nav-drawer.is-open {
  opacity: 1;
  pointer-events: auto;
}
.nav-drawer__panel {
  display: flex;
  height: 100%;
  flex-direction: column;
  padding: 92px var(--pad) 34px;
  overflow-y: auto;
}
.nav-drawer__label {
  margin-bottom: 18px;
  padding-left: .55em;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 10px;
  letter-spacing: .55em;
}
.nav-drawer__panel a {
  display: grid;
  min-height: 40px;
  grid-template-columns: 46px 1fr;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  border-top: 1px solid var(--hairline-soft);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 15px;
  letter-spacing: .14em;
}
.nav-drawer__panel a:last-child {
  border-bottom: 1px solid var(--hairline-soft);
}
.nav-drawer__panel a span {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: .28em;
}

/* ================================================================
   BUTTONS
   ================================================================ */
.btn-line {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 26px;
  border-radius: 999px;
  background: var(--green);
  color: var(--white);
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: .2em;
  box-shadow: 0 14px 30px -16px rgba(0,0,0,.5), inset 0 0 0 1px rgba(255,255,255,.08);
  transition: transform .25s ease, background .25s ease;
}
.btn-line:hover {
  transform: translateY(-1px);
  background: var(--green-deep);
}
.btn-line svg {
  width: 16px;
  height: 16px;
}

/* ================================================================
   REDUCED MOTION
   ================================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}