/* ============================================================
   7dojo — dark sumi-e ink
   ink ground · warm sumi white · single shu (vermilion) accent
   ============================================================ */

:root {
  --ink:      #0b0b0c;   /* ground */
  --ink-2:    #101012;   /* raised */
  --sumi:     #ECEAE3;   /* warm paper white (primary text) */
  --sumi-dim: #8b887f;   /* muted */
  --sumi-faint:#56544e;  /* very muted */
  --shu:      #E2492F;   /* vermilion accent — used sparingly */
  --line:     rgba(236, 234, 227, 0.09);
  --line-soft:rgba(236, 234, 227, 0.05);

  --serif: "Shippori Mincho B1", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans:  "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --pad:  clamp(1.5rem, 5vw, 5rem);
}

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

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

body {
  background: var(--ink);
  color: var(--sumi);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

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

/* ── paper grain overlay ─────────────────────────────────── */
.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.035;
  mix-blend-mode: screen;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* faint vignette to deepen the ink at the edges */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(120% 90% at 50% 30%, transparent 55%, rgba(0,0,0,0.55) 100%);
}

main, .nav, .foot { position: relative; z-index: 2; }

/* ── nav ─────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.4rem var(--pad);
  mix-blend-mode: difference;  /* stays legible over any section */
}
.nav__mark { display: flex; align-items: baseline; gap: 0.55rem; }
.nav__kanji { font-family: var(--serif); font-size: 1.15rem; color: var(--sumi); }
.nav__word  {
  font-family: var(--serif);
  font-size: 0.95rem;
  letter-spacing: 0.18em;
  color: var(--sumi);
}
.nav__contact {
  display: inline-flex;
  align-items: center;
  gap: 0.34em;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--sumi);
  opacity: 0.85;
  transition: opacity 0.4s var(--ease);
}
.nav__contact:hover { opacity: 1; }
.nav__contact-icon { width: 0.9em; height: 0.9em; }
.nav__right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.3rem;
}
.nav__social {
  display: inline-flex;
  align-items: center;
  gap: 0.34em;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--sumi);
  opacity: 0.7;
  transition: opacity 0.4s var(--ease);
}
.nav__social:hover { opacity: 1; }
.nav__social-icon { width: 0.85em; height: 0.85em; }

/* ── hero ────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--pad);
  text-align: center;
  overflow: hidden;
}

/* giant ghost kanji watermark */
.hero__kanji {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -52%);
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(20rem, 58vw, 46rem);
  line-height: 1;
  color: var(--sumi);
  opacity: 0.035;
  user-select: none;
  z-index: 0;
}

.hero__inner { position: relative; z-index: 1; }

.hero__eyebrow {
  font-family: var(--serif);
  font-size: clamp(0.8rem, 2.4vw, 0.95rem);
  letter-spacing: 0.22em;
  color: var(--sumi-dim);
  margin-bottom: 1.6rem;
}

.hero__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(4.5rem, 18vw, 11rem);
  line-height: 0.95;
  letter-spacing: 0.02em;
  color: var(--sumi);
}

.brush { width: clamp(180px, 40vw, 260px); height: auto; margin: 1.8rem auto 2.2rem; display: block; }
.brush__line { stroke-dasharray: 320; stroke-dashoffset: 320; }
.brush__dot  { transform-origin: center; transform: scale(0); }

.hero__lede {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.15rem, 3.6vw, 1.7rem);
  line-height: 1.55;
  color: var(--sumi);
  opacity: 0.92;
}

.hero__scroll {
  position: absolute;
  bottom: 2.4rem; left: 50%;
  transform: translateX(-50%);
  font-family: var(--serif);
  font-size: 1.1rem;
  color: var(--sumi-dim);
  animation: drift 2.6s var(--ease) infinite;
}
@keyframes drift {
  0%, 100% { transform: translate(-50%, 0); opacity: 0.5; }
  50%      { transform: translate(-50%, 7px); opacity: 1; }
}

/* ── shared section labels ───────────────────────────────── */
.section-label {
  font-size: 0.72rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--sumi-faint);
  margin-bottom: 2.6rem;
}
.kanji-accent { font-family: var(--serif); font-weight: 600; }

/* ── philosophy band ─────────────────────────────────────── */
.band {
  padding: clamp(6rem, 16vh, 11rem) var(--pad);
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}
.band__rule {
  width: 1px;
  height: clamp(3rem, 9vh, 5.5rem);
  margin: 0 auto 3rem;
  background: linear-gradient(var(--sumi-faint), transparent);
}
.band__text {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.3rem, 4.2vw, 2.1rem);
  line-height: 1.6;
  color: var(--sumi);
  opacity: 0.94;
}
.band__text em { font-style: italic; color: var(--shu); }
.band__text .kanji-accent { color: var(--sumi); }

/* ── focus / areas of focus ──────────────────────────────── */
.focus {
  padding: clamp(5rem, 12vh, 9rem) var(--pad);
  max-width: 1000px;
  margin: 0 auto;
  border-top: 1px solid var(--line-soft);
}
.focus .section-label { text-align: center; }
.focus__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(2.4rem, 5vw, 4rem) clamp(2.4rem, 6vw, 5rem);
}
.focus__item {
  padding-top: 1.6rem;
  border-top: 1px solid var(--line-soft);
}
.focus__num {
  display: block;
  font-family: var(--serif);
  font-size: 1.5rem;
  color: var(--shu);
  margin-bottom: 1rem;
}
.focus__head {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.4rem;
  letter-spacing: 0.01em;
  margin-bottom: 0.85rem;
  color: var(--sumi);
}
.focus__body {
  font-size: 0.97rem;
  line-height: 1.75;
  color: var(--sumi-dim);
}

/* ── contact (footer) ────────────────────────────────────── */
.foot {
  padding: clamp(6rem, 16vh, 11rem) var(--pad) 3rem;
  text-align: center;
  border-top: 1px solid var(--line);
  background: var(--ink-2);
}
.foot .section-label { text-align: center; }
.foot__invite {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2rem, 7vw, 3.4rem);
  letter-spacing: 0.01em;
  color: var(--sumi);
  margin-bottom: 0.9rem;
}
.foot__sub {
  font-family: var(--serif);
  font-size: clamp(1.05rem, 3.2vw, 1.4rem);
  color: var(--sumi-dim);
  margin-bottom: 3.2rem;
}

/* ── contact form ────────────────────────────────────────── */
.contact {
  max-width: 540px;
  margin: 0 auto;
  text-align: left;
}
.contact__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.6rem;
}
.field { display: block; margin-bottom: 1.8rem; }
.field__label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sumi-faint);
  margin-bottom: 0.6rem;
}
.field__input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  color: var(--sumi);
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 300;
  padding: 0.4rem 0;
  transition: border-color 0.4s var(--ease);
  resize: vertical;
}
.field__input::placeholder { color: var(--sumi-faint); }
.field__input:focus {
  outline: none;
  border-bottom-color: var(--shu);
}
textarea.field__input { line-height: 1.6; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

.contact__send {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  margin-top: 0.6rem;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--sumi);
  font-family: var(--serif);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  padding: 0.85rem 2rem;
  cursor: pointer;
  transition: border-color 0.4s var(--ease), color 0.4s var(--ease), background 0.4s var(--ease);
}
.contact__arrow { transition: transform 0.4s var(--ease); }
.contact__send:hover {
  border-color: var(--shu);
  color: var(--shu);
}
.contact__send:hover .contact__arrow { transform: translateX(5px); }
.contact__send:disabled { opacity: 0.5; cursor: default; }

.contact__status {
  margin-top: 1.4rem;
  min-height: 1.2em;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  color: var(--sumi-dim);
}
.contact__status.is-ok    { color: var(--sumi); }
.contact__status.is-error { color: var(--shu); }

.foot__base {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1160px;
  margin: clamp(4rem, 12vh, 7rem) auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--line-soft);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--sumi-faint);
}
.foot__mark { font-family: var(--serif); letter-spacing: 0.14em; }
.foot__link {
  color: inherit;
  text-decoration: none;
  letter-spacing: 0.14em;
  opacity: 0.85;
  transition: opacity 0.3s var(--ease);
}
.foot__link:hover { opacity: 1; }

/* ── reveal animation ────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 1s var(--ease), transform 1s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }

/* brush draws once it enters */
.brush.is-in .brush__line {
  animation: draw 1.1s var(--ease) 0.15s forwards;
}
.brush.is-in .brush__dot {
  animation: pop 0.5s var(--ease) 1.0s forwards;
}
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes pop  { to { transform: scale(1); } }

/* ── responsive ──────────────────────────────────────────── */
@media (max-width: 760px) {
  .focus__grid { grid-template-columns: 1fr; gap: 2.6rem; }
  .contact__row { grid-template-columns: 1fr; gap: 0; }
  .nav__contact { font-size: 0.72rem; }
}

/* ── reduced motion ──────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__scroll { animation: none; }
  .brush__line { stroke-dashoffset: 0; }
  .brush__dot  { transform: scale(1); }
}