/* ==========================================================================
   WEI STUDIO — Crouwel Grid Specimen × pixel
   One stylesheet for both pages. No frameworks, no external requests.
   ========================================================================== */

@font-face {
  font-family: "PixelLatin";
  src: url("../fonts/silkscreen-400.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "PixelLatin";
  src: url("../fonts/silkscreen-700.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: "PixelCJK";
  src: url("../fonts/pixel-cjk.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

:root {
  --ink: #0b0b0c;
  --ink-raise: #131316;
  --paper: #f4f1e9;
  --accent: #ffd400;
  --muted: rgba(244, 241, 233, 0.56);
  --faint: rgba(244, 241, 233, 0.32);
  --line: rgba(244, 241, 233, 0.14);
  --line-strong: rgba(244, 241, 233, 0.3);

  --font-display: "PixelLatin", "PixelCJK", ui-monospace, "SFMono-Regular", monospace;
  --font-text: ui-monospace, "SFMono-Regular", Menlo, "PingFang SC", "Noto Sans SC",
    "Microsoft YaHei", monospace;

  --grid-gap: clamp(16px, 2vw, 32px);
  --shell: 1440px;
  --pad: clamp(20px, 4vw, 56px);
  --section: clamp(72px, 9vw, 148px);

  --step-1: 11px;
  --step-0: clamp(13px, 1.05vw, 15px);
  --step-2: clamp(20px, 2.2vw, 30px);
  --step-3: clamp(28px, 3.6vw, 54px);
  --step-4: clamp(44px, 7vw, 110px);
  --step-5: clamp(56px, 12vw, 190px);
}

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

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-text);
  font-size: var(--step-0);
  line-height: 1.75;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: none;
  text-rendering: optimizeSpeed;
  overflow-x: hidden;
}

/* 12-column hairline grid, the specimen sheet the whole site sits on. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(
      to right,
      var(--line) 0 1px,
      transparent 1px calc(100% / 12)
    ),
    repeating-linear-gradient(
      to bottom,
      var(--line) 0 1px,
      transparent 1px 120px
    );
  opacity: 0.5;
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--pad);
  position: relative;
  z-index: 1;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 99;
  padding: 10px 16px;
  background: var(--accent);
  color: var(--ink);
}

.skip:focus {
  left: 12px;
  top: 12px;
}

/* ---------------------------------------------------------------- top bar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--ink);
  border-bottom: 1px solid var(--line-strong);
}

.topbar__inner {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: var(--grid-gap);
  min-height: 64px;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-right: 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(13px, 1.3vw, 16px);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
}

.wordmark__mark {
  width: 14px;
  height: 14px;
  flex: none;
  background: var(--accent);
  box-shadow: 4px 4px 0 0 var(--paper);
}

.nav {
  display: flex;
  align-items: stretch;
  margin-left: auto;
}

.nav a {
  display: flex;
  align-items: center;
  padding: 0 clamp(12px, 1.6vw, 24px);
  border-left: 1px solid var(--line);
  font-size: var(--step-1);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 140ms linear, background 140ms linear;
  white-space: nowrap;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--ink);
  background: var(--accent);
}

.lang-switch {
  display: flex;
  align-items: stretch;
  border-left: 1px solid var(--line);
}

.lang-switch button {
  padding: 0 clamp(12px, 1.4vw, 20px);
  font-size: var(--step-1);
  letter-spacing: 0.14em;
  color: var(--faint);
  transition: color 140ms linear, background 140ms linear;
}

.lang-switch button + button {
  border-left: 1px solid var(--line);
}

.lang-switch button[aria-pressed="true"] {
  color: var(--ink);
  background: var(--paper);
}

.lang-switch button:hover {
  color: var(--paper);
}

.lang-switch button[aria-pressed="true"]:hover {
  color: var(--ink);
}

/* ---------------------------------------------------------------- hero */

.hero {
  padding-block: clamp(48px, 7vw, 110px) clamp(28px, 4vw, 56px);
  border-bottom: 1px solid var(--line-strong);
}

.kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 clamp(20px, 3vw, 40px);
  font-size: var(--step-1);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
}

.kicker::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line-strong);
}

.hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 5.2vw, 76px);
  line-height: 1.16;
  letter-spacing: 0;
  text-transform: uppercase;
  overflow-wrap: break-word;
}

.hero__line {
  display: block;
}

.hero__title em {
  font-style: normal;
  color: var(--accent);
}

.hero__lede {
  max-width: 58ch;
  margin: clamp(24px, 3vw, 40px) 0 0;
  font-size: clamp(15px, 1.6vw, 21px);
  line-height: 1.7;
  color: var(--muted);
}

/* specimen strip: labels + values, the Crouwel part */
.specimen {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: clamp(32px, 4vw, 64px);
  border-top: 1px solid var(--line-strong);
}

.specimen > div {
  padding: 16px 18px 0 0;
  border-right: 1px solid var(--line);
}

.specimen > div:last-child {
  border-right: 0;
}

.specimen dt {
  font-size: var(--step-1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
}

.specimen dd {
  margin: 4px 0 0;
  font-size: var(--step-0);
  letter-spacing: 0.06em;
  color: var(--paper);
}

/* ---------------------------------------------------------------- sections */

.section {
  padding-block: var(--section);
  border-bottom: 1px solid var(--line-strong);
  scroll-margin-top: 72px;
}

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--grid-gap);
  margin-bottom: clamp(28px, 3.5vw, 56px);
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
}

.section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-3);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1.1;
}

.section__index {
  font-size: var(--step-1);
  letter-spacing: 0.2em;
  color: var(--faint);
  text-transform: uppercase;
  white-space: nowrap;
}

/* ---------------------------------------------------------------- game cards */

.games {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--grid-gap);
}

.card {
  grid-column: span 6;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line-strong);
  background: var(--ink-raise);
  position: relative;
  transition: border-color 160ms linear, transform 160ms linear;
}

.card--lead {
  grid-column: span 8;
}

.card--wide {
  grid-column: span 4;
}

/* 占位条：告诉访客还会有更多作品 */
.card--ghost {
  grid-column: span 12;
}

.card--ghost .card__body {
  flex-direction: row;
  align-items: center;
  gap: clamp(16px, 2vw, 32px);
}

.card--ghost .card__meta {
  flex: none;
}

.card--ghost .card__title {
  font-size: var(--step-1);
  letter-spacing: 0.2em;
  color: var(--muted);
  font-weight: 400;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.card__media {
  position: relative;
  aspect-ratio: 1024 / 500;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    repeating-conic-gradient(
      from 0deg at 0 0,
      rgba(244, 241, 233, 0.05) 0 25%,
      transparent 0 50%
    )
    0 0 / 8px 8px;
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card__media--empty {
  display: grid;
  place-items: center;
}

.card__media--empty span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(64px, 7vw, 132px);
  line-height: 1;
  color: rgba(244, 241, 233, 0.09);
  letter-spacing: 0.02em;
}

.card__body {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(18px, 2vw, 30px);
  flex: 1;
}

.card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: var(--step-1);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}

.card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-2);
  letter-spacing: 0.02em;
  line-height: 1.15;
  text-transform: uppercase;
}

.card__title span {
  display: block;
  margin-top: 8px;
  font-family: var(--font-text);
  font-size: var(--step-1);
  letter-spacing: 0.18em;
  color: var(--muted);
}

.card__text {
  margin: 0;
  color: var(--muted);
  font-size: var(--step-0);
}

.card__foot {
  margin-top: auto;
  padding-top: 6px;
}

/* status pill */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  font-size: var(--step-1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.pill::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--faint);
}

.pill[data-status="released"] {
  border-color: var(--accent);
  color: var(--accent);
}

.pill[data-status="released"]::before {
  background: var(--accent);
}

/* ---------------------------------------------------------------- buttons */

.btn {
  --cut: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 54px;
  padding: 0 22px;
  background: var(--accent);
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-1);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut)) 0,
    100% var(--cut),
    100% 100%,
    var(--cut) 100%,
    0 calc(100% - var(--cut))
  );
  transition: background 140ms linear, color 140ms linear;
}

.btn::after {
  content: "→";
  font-size: 1.1em;
  line-height: 1;
}

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

.btn--ghost {
  background: transparent;
  color: var(--paper);
  box-shadow: inset 0 0 0 1px var(--line-strong);
  clip-path: none;
}

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

.btn[aria-disabled="true"] {
  background: transparent;
  color: var(--faint);
  box-shadow: inset 0 0 0 1px var(--line);
  pointer-events: none;
}

.btn[aria-disabled="true"]::after {
  content: "·";
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------------------------------------------------------------- studio */

.studio {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--grid-gap);
}

.studio__title {
  grid-column: span 4;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-2);
  line-height: 1.15;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.studio__body {
  grid-column: 5 / span 8;
  display: grid;
  gap: 20px;
  max-width: 78ch;
}

.studio__body p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(14px, 1.35vw, 18px);
  line-height: 1.85;
}

.studio__body p:first-child {
  color: var(--paper);
  font-size: clamp(16px, 1.8vw, 24px);
  line-height: 1.6;
}

.studio__facts {
  grid-column: 5 / span 8;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 12px;
  border-top: 1px solid var(--line-strong);
}

.studio__facts > div {
  padding: 18px 16px 0 0;
  border-right: 1px solid var(--line);
}

.studio__facts > div:last-child {
  border-right: 0;
}

.studio__facts dt {
  font-size: var(--step-1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
}

.studio__facts dd {
  margin: 4px 0 0;
}

/* ---------------------------------------------------------------- detail page */

.page-head {
  padding-block: clamp(40px, 5vw, 80px) clamp(24px, 3vw, 44px);
  border-bottom: 1px solid var(--line-strong);
}

.crumbs {
  margin: 0 0 clamp(20px, 2.5vw, 34px);
  font-size: var(--step-1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
}

.crumbs a:hover {
  color: var(--accent);
}

.page-head__row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--grid-gap);
}

.page-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-4);
  line-height: 0.98;
  text-transform: uppercase;
}

.page-sub {
  margin: 10px 0 0;
  font-size: var(--step-1);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero-shot {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--ink-raise);
  margin-top: clamp(28px, 3.5vw, 52px);
}

.hero-shot img {
  width: 100%;
}

.detail {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--grid-gap);
  padding-block: var(--section);
  border-bottom: 1px solid var(--line-strong);
}

.detail__main {
  grid-column: span 7;
}

.detail__aside {
  grid-column: 8 / span 5;
}

.detail h2 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-2);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.detail p {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: clamp(14px, 1.4vw, 18px);
  line-height: 1.85;
  max-width: 68ch;
}

.feature-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.feature-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  color: var(--paper);
}

.feature-list li::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 9px;
  background: var(--accent);
}

/* download panel */
.panel {
  border: 1px solid var(--line-strong);
  background: var(--ink-raise);
  padding: clamp(20px, 2.2vw, 32px);
  position: sticky;
  top: 88px;
}

.panel__label {
  margin: 0 0 16px;
  font-size: var(--step-1);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--faint);
}

.panel__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-2);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.panel__meta {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: var(--step-1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.panel .btn {
  width: 100%;
}

.kv {
  margin: 0 0 20px;
  border-top: 1px solid var(--line);
}

.kv > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}

.kv dt {
  font-size: var(--step-1);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
  white-space: nowrap;
}

.kv dd {
  margin: 0;
  font-size: var(--step-1);
  letter-spacing: 0.06em;
  color: var(--paper);
  text-align: right;
  overflow-wrap: anywhere;
}

.detail h2.detail__spaced {
  margin-top: 44px;
}

.page-head .pill {
  margin-bottom: 14px;
}

.panel__note {
  margin: 14px 0 0;
  color: var(--faint);
  font-size: var(--step-1);
  line-height: 1.7;
  letter-spacing: 0.06em;
  word-break: break-all;
}

.panel__store {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 10px;
}

.panel__store p {
  margin: 0;
  color: var(--faint);
  font-size: var(--step-1);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* screenshots */
.screens {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--grid-gap);
}

.screens figure {
  margin: 0;
}

.screens .frame {
  border: 1px solid var(--line-strong);
  background: var(--ink-raise);
  padding: 0;
  overflow: hidden;
  transition: border-color 160ms linear;
}

.screens figure:hover .frame {
  border-color: var(--accent);
}

.screens figcaption {
  margin-top: 10px;
  font-size: var(--step-1);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}

/* ---------------------------------------------------------------- footer */

.footer {
  padding-block: clamp(40px, 5vw, 72px) 32px;
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--grid-gap);
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

.footer__brand {
  grid-column: span 5;
}

.footer__brand p {
  margin: 12px 0 0;
  color: var(--muted);
  max-width: 34ch;
}

.footer__col {
  grid-column: span 3;
}

.footer__col h3 {
  margin: 0 0 12px;
  font-size: var(--step-1);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--faint);
  font-weight: 400;
}

.footer__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.footer__col a {
  font-size: var(--step-1);
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
}

.footer__col a:hover {
  color: var(--accent);
}

.footer__base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 22px;
  font-size: var(--step-1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

/* ---------------------------------------------------------------- motion */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms cubic-bezier(0.2, 0.7, 0.2, 1),
    transform 520ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .card:hover {
    transform: none;
  }
  * {
    transition-duration: 0.01ms !important;
  }
}

/* ---------------------------------------------------------------- responsive */

@media (max-width: 1080px) {
  .card,
  .card--lead,
  .card--wide {
    grid-column: span 6;
  }
  .detail__main,
  .detail__aside {
    grid-column: span 12;
  }
  .panel {
    position: static;
  }
}

@media (max-width: 860px) {
  body::before {
    background-image: repeating-linear-gradient(
        to right,
        var(--line) 0 1px,
        transparent 1px calc(100% / 6)
      ),
      repeating-linear-gradient(to bottom, var(--line) 0 1px, transparent 1px 96px);
  }
  .section {
    scroll-margin-top: 116px;
  }
  .topbar__inner {
    flex-wrap: wrap;
    min-height: 0;
  }
  .wordmark {
    min-height: 56px;
  }
  .nav {
    order: 3;
    width: 100%;
    border-top: 1px solid var(--line);
    overflow-x: auto;
  }
  .nav a {
    min-height: 46px;
    padding-inline: 14px;
  }
  .lang-switch {
    margin-left: auto;
    border-left: 0;
  }
  .lang-switch button {
    min-height: 56px;
  }
  .specimen {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .specimen > div:nth-child(2) {
    border-right: 0;
  }
  .specimen > div:nth-child(n + 3) {
    padding-top: 16px;
    border-top: 1px solid var(--line);
  }
  .studio__title,
  .studio__body,
  .studio__facts {
    grid-column: span 12;
  }
  .studio__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .games {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
  .card,
  .card--lead,
  .card--wide {
    grid-column: span 6;
  }
  .screens {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer__brand {
    grid-column: span 12;
  }
  .footer__col {
    grid-column: span 4;
  }
  .section__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

@media (max-width: 560px) {
  .specimen {
    grid-template-columns: 1fr;
  }
  .specimen > div {
    border-right: 0;
    padding-top: 14px;
    border-top: 1px solid var(--line);
  }
  .specimen > div:first-child {
    border-top: 0;
  }
  .screens {
    grid-template-columns: 1fr;
  }
  .footer__col {
    grid-column: span 12;
  }
  .studio__facts {
    grid-template-columns: 1fr;
  }
  .studio__facts > div {
    border-right: 0;
    border-top: 1px solid var(--line);
  }
  .btn {
    width: 100%;
  }
}