/* Icon font: subset of Font Awesome Free 6.5.2 (fontawesome.com, SIL OFL 1.1) */
@font-face { font-family: "Icons Solid"; src: url("../fonts/icons-solid.woff2?v=2") format("woff2"); font-display: block; }
@font-face { font-family: "Icons Brands"; src: url("../fonts/icons-brands.woff2") format("woff2"); font-display: block; }

:root {
  --bg: #fff;
  --ink: #292929;
  --muted: #707070;
  --body: #535353;
  --line: #e5e5e2;
  --accent: #383838;
  --max: 1010px;
  --header-h: 76px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 28px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.9 "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  -webkit-font-smoothing: antialiased;
}
:root[lang="zh-Hans"] body { font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif; }
:root[lang="ko"] body { font-family: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif; }

a { color: inherit; text-decoration: none; }
p { margin: 0 0 13px; }
:focus-visible { outline: 2px solid #555; outline-offset: 4px; }

.wrap { max-width: var(--max); margin-inline: auto; padding-inline: 30px; }

/* Icons */
.icon { font-style: normal; font-weight: 400; line-height: 1; display: inline-block; width: 1.25em; text-align: center; }
.icon::before { font-family: "Icons Solid"; font-weight: 900; }
.icon-gamepad::before { content: "\f11b"; }
.icon-heart::before { content: "\f004"; }
.icon-play::before { content: "\f04b"; }
.icon-mail::before { content: "\f0e0"; }
.icon-globe::before { content: "\f0ac"; }
.icon-x::before, .icon-youtube::before, .icon-github::before { font-family: "Icons Brands"; font-weight: 400; }
.icon-x::before { content: "\e61b"; }
.icon-youtube::before { content: "\f167"; }
.icon-github::before { content: "\f09b"; }

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .25s ease;
}
.header.is-scrolled { box-shadow: 0 6px 20px rgba(0, 0, 0, .06); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: var(--header-h); }

.brand { display: flex; align-items: center; gap: 12px; white-space: nowrap; }
.brand-logo { display: block; width: 56px; height: 56px; transition: transform .35s var(--ease); }
.brand:hover .brand-logo { transform: rotate(-8deg) scale(1.05); }
.brand-text { font-size: 22px; font-weight: 700; letter-spacing: -.055em; }

.nav { position: relative; display: flex; gap: 28px; }
.nav a { padding: 12px 0; color: #777; font-size: 13px; transition: color .2s ease; }
.nav a:hover, .nav a.active { color: var(--ink); }
.nav a.active { font-weight: 700; }
.nav-indicator {
  position: absolute;
  left: 0;
  bottom: 5px;
  width: 1px;
  height: 2px;
  background: #424242;
  opacity: 0;
  transform-origin: left;
  transition: transform .3s var(--ease), opacity .2s ease;
}

/* Language menu */
.lang { position: relative; flex-shrink: 0; }
.lang summary { display: flex; align-items: center; gap: 4px; padding: 5px 9px; border: 1px solid var(--line); border-radius: 4px; color: #666; font-size: 12px; white-space: nowrap; cursor: pointer; list-style: none; transition: border-color .2s ease, color .2s ease; }
.lang summary::-webkit-details-marker { display: none; }
.lang summary:hover, .lang[open] summary { border-color: #999; color: var(--ink); }
.lang-menu { position: absolute; right: 0; top: calc(100% + 6px); display: grid; min-width: 130px; padding: 5px; background: #fff; border: 1px solid var(--line); border-radius: 5px; box-shadow: 0 8px 22px rgba(0, 0, 0, .12); animation: lang-open .16s var(--ease); }
.lang-menu a { padding: 5px 10px; border-radius: 3px; font-size: 13px; }
.lang-menu a:hover { background: #f4f4f4; }
.lang-menu a[aria-current] { font-weight: 700; }
@keyframes lang-open { from { opacity: 0; transform: translateY(-4px); } }

/* Layout */
.main { padding-block: 56px 90px; }
.page + .page { margin-top: 78px; padding-top: 68px; border-top: 1px solid var(--line); }
.heading { margin: 0 0 10px; font-size: 37px; font-weight: 700; line-height: 1.4; letter-spacing: -.045em; }
.lead { margin: 0 0 39px; color: #777; }
.content { max-width: 720px; }
.content > p, .section p, .rules { color: var(--body); }
.section { margin-bottom: 43px; }
.section:last-child { margin-bottom: 0; }
.section h3 { margin: 0 0 14px; font-size: 17px; letter-spacing: -.025em; }

/* Games */
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px 26px; }
.game { display: block; min-width: 0; }
.art { aspect-ratio: 16 / 9; overflow: hidden; background: #f0f0ee; border: 1px solid var(--line); border-radius: 5px; transition: border-color .25s ease, box-shadow .25s ease; }
.art img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform .45s var(--ease); }
a.game:hover .art { border-color: #999; box-shadow: 0 8px 22px rgba(0, 0, 0, .14); }
a.game:hover .art img { transform: scale(1.035); }
a.game:hover h3 { text-decoration: underline; text-underline-offset: 3px; }

.title-line { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 12px; }
.game h3 { margin: 0; font-size: 16px; font-weight: 700; }
.status { color: #777; font-size: 11px; white-space: nowrap; }
.status.play { display: inline-flex; align-items: center; gap: 3px; padding: 1px 10px 1px 7px; border-radius: 99px; background: var(--accent); color: #fff; font-weight: 700; transition: background .2s ease; }
.status.play .icon { font-size: 8px; transition: transform .25s var(--ease); }
a.game:hover .status.play { background: #000; }
a.game:hover .status.play .icon { transform: translateX(2px); }
.desc { margin: 2px 0 0; color: #777; font-size: 13px; }

/* Lists */
.rules { padding-left: 19px; margin: 0 0 13px; }
.rules li { margin: 8px 0; }
.history { display: grid; grid-template-columns: 68px 1fr; gap: 7px 15px; margin: 14px 0; }
.history dt { color: var(--muted); font-size: 13px; }
.history dd { margin: 0; }

/* Link buttons */
.links { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; max-width: 560px; }
.links a { display: flex; justify-content: space-between; align-items: center; gap: 8px; min-width: 0; padding: 14px 17px; background: #fff; border: 1px solid var(--line); border-radius: 4px; font-weight: 700; transition: background .2s ease, border-color .2s ease, transform .2s var(--ease); }
.links a:hover { background: #f7f7f7; border-color: #bbb; transform: translateY(-1px); }
.link-label { display: inline-flex; align-items: center; gap: 10px; min-width: 0; overflow-wrap: anywhere; }
.link-label .icon { color: #555; }
.arrow { color: var(--muted); transition: transform .2s var(--ease); }
.links a:hover .arrow { transform: translate(2px, -2px); }

/* Footer */
.footer { display: flex; justify-content: space-between; padding-block: 24px 35px; border-top: 1px solid var(--line); color: #91948f; font-size: 12px; }

/* Scroll reveal: only hidden when JS is running */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s var(--ease) var(--delay, 0s), transform .55s var(--ease) var(--delay, 0s); }
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .header-inner { display: block; position: relative; padding-top: 12px; }
  .brand-logo { width: 46px; height: 46px; }
  .brand-text { font-size: 20px; }
  .nav { gap: 22px; overflow-x: auto; padding-bottom: 2px; scrollbar-width: none; }
  .nav::-webkit-scrollbar { display: none; }
  .nav a { flex-shrink: 0; font-size: 12px; }
  .nav-indicator { bottom: 7px; }
  .lang { position: absolute; top: 19px; right: 30px; }
}

@media (max-width: 730px) {
  .wrap { padding-inline: 20px; }
  .lang { right: 20px; }
  .main { padding-block: 38px 65px; }
  .page + .page { margin-top: 54px; padding-top: 42px; }
  .heading { font-size: 31px; }
  .lead { margin-bottom: 25px; }
  .grid { gap: 28px 13px; }
  .title-line { display: block; }
  .game h3 { font-size: 14px; }
  .links { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}