@import url('https://fonts.googleapis.com/css2?family=Shippori+Mincho:wght@400;500;600;700&family=Noto+Sans+JP:wght@300;400;500;600;700&family=JetBrains+Mono:wght@500;600;700&display=swap');

:root {
  --paper: #1B1B1F;
  --paper-deep: #232429;
  --ink: #F1F2ED;
  --ink-soft: #A8A9A2;
  --indigo: #2F3B57;
  --indigo-deep: #212A3E;
  --aged-red: #D06A4C;
  --gold: #B08A4E;
  --line: rgba(255, 255, 255, .14);
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 400;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
.hero-title {
  font-family: 'Shippori Mincho', serif;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--ink);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.28rem;
}

.brand span {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--ink);
}

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

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

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(27, 27, 31, .88);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
}

.seal {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1.5px solid var(--aged-red);
  color: var(--aged-red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Shippori Mincho', serif;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: -.02em;
  flex-shrink: 0;
}

.brand-mark {
  height: 48px;
  width: auto;
  display: block;
  flex-shrink: 0;
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 34px;
}

nav.main-nav ul {
  list-style: none;
  display: flex;
  gap: 30px;
  margin: 0;
  padding: 0;
}

nav.main-nav a {
  font-size: .92rem;
  letter-spacing: .05em;
  position: relative;
  padding: 4px 0;
  color: var(--ink-soft);
}

nav.main-nav a:hover,
nav.main-nav a.active {
  color: var(--ink);
}

nav.main-nav a.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--aged-red);
}

.lang-toggle {
  display: flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  font-size: .78rem;
  letter-spacing: .06em;
}

.lang-toggle button {
  border: none;
  background: transparent;
  padding: 6px 14px;
  cursor: pointer;
  font-family: inherit;
  color: var(--ink-soft);
}

.lang-toggle button.active {
  background: var(--indigo);
  color: var(--ink);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  margin: 5px 0;
}

/* ---------- brush divider (signature element) ---------- */
.brush {
  width: 120px;
  height: 14px;
  margin: 18px 0 26px;
  transform-origin: left;
  animation: brushIn .9s cubic-bezier(.2, .8, .2, 1) both;
  animation-delay: .1s;
}

.brush.center {
  margin-left: auto;
  margin-right: auto;
}

.brush path {
  fill: var(--gold);
}

@keyframes brushIn {
  from {
    opacity: 0;
    transform: scaleX(.4);
  }

  to {
    opacity: 1;
    transform: scaleX(1);
  }
}

/* ---------- hero ---------- */
.hero {
  padding: 96px 0 64px;
}

.eyebrow {
  font-size: .78rem;
  letter-spacing: .22em;
  color: var(--aged-red);
  text-transform: uppercase;
  margin: 0 0 18px;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  margin: 0 0 6px;
  line-height: 1.25;
}

.hero-brand {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  letter-spacing: .01em;
  color: var(--ink);
  margin: 0 0 6px;
  line-height: 1.25;
}

.hero-logo {
  width: 100%;
  max-width: 460px;
  height: auto;
  margin: 4px 0 8px;
}

.page-title {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 2.7rem);
  letter-spacing: .01em;
  margin: 0 0 4px;
}

.page-lead {
  color: var(--ink-soft);
  margin: 0;
}

/* ---------- sections ---------- */
section {
  padding: 64px 0;
}

section.alt {
  background: var(--paper-deep);
}

.section-head {
  margin-bottom: 8px;
}

.section-head h2 {
  font-size: 1.7rem;
  margin: 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 56px;
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 30px 28px;
}

.card h3 {
  font-size: 1.15rem;
  margin: 0 0 10px;
}

.card p {
  color: var(--ink-soft);
  margin: 0;
  font-size: .95rem;
}

/* ---------- game card ---------- */
.game-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  border: 1px solid var(--line);
  background: var(--paper);
  align-items: center;
}

.game-card .art {
  background: var(--indigo-deep);
  aspect-ratio: 3/4;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  font-family: 'Shippori Mincho', serif;
  font-size: 2.4rem;
  writing-mode: vertical-rl;
  letter-spacing: .3em;
}

.game-card .body {
  padding: 34px 34px 34px 0;
}

.status-pill {
  display: inline-block;
  font-size: .72rem;
  letter-spacing: .08em;
  border: 1px solid var(--aged-red);
  color: var(--aged-red);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.meta-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  font-size: .88rem;
  color: var(--ink-soft);
}

.meta-list li {
  display: flex;
  gap: 10px;
  padding: 6px 0;
  border-top: 1px solid var(--line);
}

.meta-list li span:first-child {
  width: 110px;
  flex-shrink: 0;
  color: var(--ink);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  padding: 13px 30px;
  border: 1px solid var(--ink);
  font-size: .88rem;
  letter-spacing: .05em;
  border-radius: 999px;
  transition: background .25s, color .25s;
}

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

.btn.primary {
  background: var(--indigo);
  border-color: var(--indigo);
  color: var(--ink);
}

.btn.primary:hover {
  background: var(--indigo-deep);
}

.btn.disabled {
  opacity: .45;
  pointer-events: none;
}

/* ---------- guidelines page ---------- */
.toc {
  border: 1px solid var(--line);
  padding: 22px 26px;
  margin-bottom: 40px;
  font-size: .92rem;
}

.toc p {
  margin: 0 0 10px;
  color: var(--ink-soft);
}

.toc ol {
  margin: 0;
  padding-left: 20px;
}

.toc a {
  color: var(--indigo);
}

.doc-section {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.doc-section:first-of-type {
  border-top: none;
}

.doc-section h2 {
  font-size: 1.4rem;
}

.doc-section h3 {
  font-size: 1.05rem;
  margin-top: 26px;
}

.doc-section p,
.doc-section li {
  color: var(--ink-soft);
  font-size: .96rem;
}

.note {
  background: var(--paper-deep);
  border-left: 3px solid var(--gold);
  padding: 16px 20px;
  font-size: .86rem;
  color: var(--ink-soft);
  margin: 20px 0;
}

.placeholder {
  color: var(--aged-red);
}

/* ---------- contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.contact-item {
  border: 1px solid var(--line);
  padding: 26px;
}

.contact-item .label {
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.contact-item .value {
  font-size: 1.05rem;
}

/* ---------- footer ---------- */
footer {
  border-top: 1px solid var(--line);
  padding: 44px 0;
  margin-top: 40px;
}

footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.foot-links {
  display: flex;
  gap: 22px;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: .85rem;
  color: var(--ink-soft);
}

.copyright {
  font-size: .78rem;
  color: var(--ink-soft);
}

.x-icon{width:16px;height:16px;display:inline-block;vertical-align:-3px;object-fit:contain;}
.x-icon-label{width:20px;height:20px;display:inline-block;vertical-align:-3px;object-fit:contain;}

/* ---------- responsive ---------- */
@media (max-width:860px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .game-card {
    grid-template-columns: 1fr;
  }

  .game-card .art {
    aspect-ratio: 16/9;
    writing-mode: horizontal-tb;
  }

  .game-card .body {
    padding: 28px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width:720px) {
  nav.main-nav ul {
    position: fixed;
    top: 78px;
    left: 0;
    right: 0;
    background: var(--paper);
    flex-direction: column;
    padding: 20px 28px;
    gap: 18px;
    border-bottom: 1px solid var(--line);
    transform: translateY(-100vh);
    transition: transform .3s ease;
  }

  nav.main-nav ul.open {
    transform: translateY(0);
  }

  .nav-toggle {
    display: block;
  }

  nav.main-nav {
    gap: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .brush {
    animation: none;
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}