/* =========================================================
   W4S — Indie Game Studio / Portal
   Design system: 純黒ミニマル × タイポ主導 × 抑制モーション
   ========================================================= */

:root {
  /* color */
  --bg: #000000;
  --fg: #ffffff;            /* 見出し・ロゴ */
  --text: #ffffff;          /* 本文 */
  --muted: #ffffff;
  --line: rgba(255, 255, 255, 0.14);
  --line-strong: rgba(255, 255, 255, 0.34);

  /* type */
  --font: 'Urbanist', 'Noto Sans JP', system-ui, -apple-system, 'Segoe UI', sans-serif;

  /* rhythm */
  --pad-x: clamp(1.25rem, 5vw, 5.5rem);
  --maxw: 1440px;
  --header-h: 68px;

  /* motion */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 0.65s;
}

/* ---------- reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img, svg, video { display: block; max-width: 100%; }
.brand-logo, .hero-logo, .footer-logo { fill: currentColor; }
/* iOS Safari は <use> 参照SVGを width:auto で描画する際に右端を僅かにクリップするため解除 */
.brand-logo, .footer-logo { overflow: visible; }
ul { list-style: none; }
button { font-family: inherit; }
::selection { background: #fff; color: #000; }

/* ---------- film grain ---------- */
.grain {
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: clamp(0.9rem, 1.8vw, 1.4rem) var(--pad-x);
  transition: background 0.4s var(--ease), backdrop-filter 0.4s var(--ease);
}
.site-header.is-scrolled {
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.brand { display: inline-flex; align-items: center; }
.brand-logo {
  height: 22px;
  width: auto;
  color: var(--fg);
  transition: opacity 0.3s var(--ease);
}
.brand:hover .brand-logo { opacity: 0.65; }

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  cursor: pointer;
  padding: 0.4em 0.2em;
}
.lang-toggle [data-lang] { color: rgba(255, 255, 255, 0.4); transition: color 0.3s var(--ease); text-decoration: none; }
.lang-toggle [data-lang].is-active { color: #fff; }
.lang-sep { opacity: 0.35; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  padding: var(--header-h) var(--pad-x) 0;
  text-align: center;
  overflow: hidden; /* ロゴ切替アニメ(scale/translateX)の横はみ出しをこの大元エリアでクリップ。ロゴ自体は枠で切らず、bodyの横拡張＝横スクロールだけを防ぐ */
}
.hero-inner {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.hero-logo-wrap { margin: 0; line-height: 0; }
.hero-logo-stack {
  position: relative;
  display: grid;
  place-items: center;
  width: min(70vw, 600px);
  height: clamp(200px, 42vh, 380px);
  color: var(--fg);
}
.hero-logo {
  grid-area: 1 / 1; /* 6枚を同一セルに重ね、フェード切替（枠外へのはみ出しは .hero 側でクリップ） */
  width: 100%;
  height: 100%;
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
  opacity: 0;
  transform-origin: center center;
  --s: 1;
}
/* 1つ目（横組み）は等倍、2・3は大きく、4・5・6はかなり大きく */
.hero-logo:nth-child(2), .hero-logo:nth-child(3) { --s: 1.25; }
.hero-logo:nth-child(4), .hero-logo:nth-child(5), .hero-logo:nth-child(6) { --s: 1.6; }
.hero-logo.is-active { opacity: 1; transform: scale(var(--s)); }
.hero-logo.is-entering { animation: heroLogoIn 0.18s cubic-bezier(0.16, 1, 0.3, 1) both; }
.hero-logo.is-leaving { animation: heroLogoOut 0.18s cubic-bezier(0.7, 0, 0.84, 0) both; }
@keyframes heroLogoIn {
  0%   { opacity: 0; transform: translateX(64px) translateY(28px) rotate(5deg) scale(var(--s)); }
  100% { opacity: 1; transform: translateX(0) translateY(0) rotate(0) scale(var(--s)); }
}
@keyframes heroLogoOut {
  0%   { opacity: 1; transform: translateX(0) translateY(0) rotate(0) scale(var(--s)); }
  45%  { opacity: 0; }
  100% { opacity: 0; transform: translateX(-64px) translateY(28px) rotate(-5deg) scale(var(--s)); }
}
/* 逆向き（左から来て右へ消える）— 3回に1回 */
.hero-logo.is-entering-rev { animation: heroLogoInRev 0.18s cubic-bezier(0.16, 1, 0.3, 1) both; }
.hero-logo.is-leaving-rev { animation: heroLogoOutRev 0.18s cubic-bezier(0.7, 0, 0.84, 0) both; }
@keyframes heroLogoInRev {
  0%   { opacity: 0; transform: translateX(-64px) translateY(28px) rotate(-5deg) scale(var(--s)); }
  100% { opacity: 1; transform: translateX(0) translateY(0) rotate(0) scale(var(--s)); }
}
@keyframes heroLogoOutRev {
  0%   { opacity: 1; transform: translateX(0) translateY(0) rotate(0) scale(var(--s)); }
  45%  { opacity: 0; }
  100% { opacity: 0; transform: translateX(64px) translateY(28px) rotate(5deg) scale(var(--s)); }
}
.hero-sub {
  margin-top: clamp(1.8rem, 4vw, 3rem);
  max-width: 34em;
  color: var(--muted);
  font-size: clamp(0.85rem, 1.6vw, 1.05rem);
  font-weight: 400;
  letter-spacing: 0.04em;
  line-height: 1.9;
  white-space: pre-line;
}
.hero-scroll {
  margin: 0 auto clamp(1.4rem, 4vh, 2.6rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  color: var(--muted);
  font-size: 0.62rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  flex-shrink: 0;
}
.hero-scroll-line {
  width: 1px;
  height: 46px;
  background: linear-gradient(var(--muted), transparent);
  transform-origin: top;
  animation: scrollLine 2.2s var(--ease) infinite;
}
@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; }
  45%  { transform: scaleY(1); transform-origin: top; }
  55%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- section (label | content grid) ---------- */
.section {
  display: grid;
  grid-template-columns: minmax(110px, 180px) 1fr;
  column-gap: clamp(1.5rem, 5vw, 5rem);
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(4.5rem, 11vh, 9rem) var(--pad-x);
  border-top: 1px solid var(--line);
}
.section-label {
  grid-column: 1;
  grid-row: 1;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
}
.section > :not(.section-label) { grid-column: 2; }

/* ---------- news ---------- */
.news-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  align-items: center;
  gap: clamp(1.5rem, 4vw, 4rem);
  padding-block: clamp(1.25rem, 2.5vw, 2rem);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.news-media {
  aspect-ratio: 1200 / 630;
  overflow: hidden;
  background: #0b0b0b;
}
.news-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.3s var(--ease);
}
.news-title {
  max-width: 25em;
  color: var(--fg);
  font-size: clamp(1.25rem, 2.4vw, 2rem);
  font-weight: 300;
  line-height: 1.55;
  letter-spacing: -0.01em;
}
.news-title strong { font-weight: 500; }
.news-feature:hover .news-media img { opacity: 0.78; }

/* ---------- about ---------- */
.statement {
  font-size: clamp(1.3rem, 2.6vw, 2.25rem);
  line-height: 1.55;
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--fg);
  max-width: 22em;
}
.about-meta {
  margin-top: clamp(2rem, 4.5vw, 3.5rem);
  display: grid;
  gap: 0;
}
.about-meta > div {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 2rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--line);
}
.about-meta dt {
  min-width: 120px;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.about-meta dd { color: var(--text); font-size: 0.92rem; }

/* ---------- works ---------- */
.works-intro,
.follow-intro {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}
.works-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.work-card {
  --glow: #ffffff;
  position: relative;
  border: 1px solid var(--line);
  background: #050505;
  overflow: hidden;
  transition: border-color 0.45s var(--ease), transform 0.45s var(--ease);
}
.work-card--feature {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
}
.work-card--feature:hover {
  border-color: color-mix(in srgb, var(--glow) 55%, var(--line));
}
.work-media {
  position: relative;
  aspect-ratio: 16 / 10;
  background: #0a0a0a;
}
.work-media img,
.work-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.work-media .play-hint {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.25);
  color: #fff;
  transition: background 0.4s var(--ease), opacity 0.4s var(--ease);
}
.work-media .play-hint span {
  width: clamp(48px, 6vw, 72px);
  height: clamp(48px, 6vw, 72px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  display: grid;
  place-items: center;
  backdrop-filter: blur(4px);
}
.work-media .play-hint span::after {
  content: "";
  border-left: 13px solid #fff;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  margin-left: 4px;
}
.work-media:hover .play-hint { background: rgba(0, 0, 0, 0.1); }

.work-info {
  padding: clamp(1.6rem, 3vw, 2.8rem);
  display: flex;
  flex-direction: column;
  gap: clamp(0.8rem, 1.5vw, 1.2rem);
}
.work-titles { display: flex; align-items: baseline; gap: 0.8em; flex-wrap: wrap; }
.work-title {
  font-size: clamp(1.8rem, 3.4vw, 2.8rem);
  font-weight: 500;
  color: var(--fg);
  line-height: 1.1;
  letter-spacing: 0.02em;
}
.work-title-roman {
  font-size: 0.85rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--muted);
}
.work-tagline {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 500;
  color: #fff;
}
.work-desc { color: var(--text); font-size: 0.95rem; line-height: 1.8; }
.work-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 0.2rem;
}
.work-cta { margin-top: auto; padding-top: 0.6rem; }
.work-cta-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  margin-top: auto;
  padding-top: 0.9rem;
  color: #fff;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.work-card--feature .btn-arrow { transition: transform 0.35s var(--ease); }
.work-card--feature:hover .btn-arrow { transform: translate(2px, -2px); }

/* coming soon */
.work-card--coming {
  border: 1px dashed var(--line);
  background: transparent;
  min-height: 150px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 2rem;
}
.work-card--coming .coming-label {
  font-size: 0.72rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--muted);
}
.work-card--coming .coming-title {
  margin-top: 0.6rem;
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 300;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  border: 1px solid var(--line-strong);
  color: var(--fg);
  padding: 0.85em 1.6em;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: background 0.35s var(--ease), color 0.35s var(--ease), border-color 0.35s var(--ease);
}
.btn:hover { background: var(--fg); color: #000; border-color: var(--fg); }
.btn .btn-arrow { transition: transform 0.35s var(--ease); }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* ---------- follow ---------- */
.social { border-top: 1px solid var(--line); }
.social-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: clamp(1.1rem, 2.8vw, 1.9rem) 0;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  transition: color 0.35s var(--ease), padding-left 0.35s var(--ease);
}
.social-link:hover { color: var(--fg); padding-left: 0.6rem; }
.social-name {
  font-size: clamp(1.4rem, 4vw, 2.4rem);
  font-weight: 300;
  letter-spacing: 0.01em;
}
.social-handle { margin-left: auto; color: var(--muted); font-size: 0.9rem; letter-spacing: 0.05em; }
.social-arrow { color: var(--muted); transition: transform 0.35s var(--ease), color 0.35s var(--ease); }
.social-link:hover .social-arrow { transform: translate(3px, -3px); color: var(--fg); }

/* ---------- contact ---------- */
.contact-lead { color: var(--text); font-size: clamp(1rem, 1.8vw, 1.2rem); max-width: 28em; margin-bottom: clamp(1.5rem, 4vw, 2.5rem); }
.contact-mail {
  display: inline-block;
  font-size: clamp(1.7rem, 6vw, 3.8rem);
  font-weight: 300;
  color: var(--fg);
  letter-spacing: -0.01em;
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s var(--ease), opacity 0.3s var(--ease);
}
.contact-mail:hover { border-color: var(--line-strong); }

/* ---------- footer ---------- */
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(2.5rem, 5vw, 4rem) var(--pad-x);
  border-top: 1px solid var(--line);
}
.footer-logo { height: 20px; width: auto; color: var(--fg); opacity: 0.85; }
.footer-social { display: flex; gap: clamp(1rem, 3vw, 2rem); }
.footer-social a { color: var(--muted); font-size: 0.82rem; letter-spacing: 0.08em; transition: color 0.3s var(--ease); }
.footer-social a:hover { color: var(--fg); }
.copyright { color: var(--muted); font-size: 0.72rem; letter-spacing: 0.06em; width: 100%; }

/* ---------- custom cursor (白丸・リンクで拡大) ---------- */
.cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #fff;
  pointer-events: none;
  z-index: 9999;
  opacity: 0;
  transform: translate(-50%, -50%);
  transition: width 0.22s var(--ease), height 0.22s var(--ease), opacity 0.3s var(--ease);
  will-change: transform;
}
.cursor.is-hover { width: 28px; height: 28px; }
/* cursor:none は白丸カーソルを起動できたページ(body.cursor-on)だけに適用。contact等やタッチ端末では通常マウス */
@media (hover: hover) and (pointer: fine) {
  body.cursor-on,
  body.cursor-on a, body.cursor-on button, body.cursor-on [role="button"],
  body.cursor-on label, body.cursor-on input, body.cursor-on textarea, body.cursor-on summary { cursor: none; }
}
@media (hover: none), (pointer: coarse) {
  .cursor { display: none; }
}

/* ---------- floating glyphs (W4S がマウス追従・上から登場) ---------- */
.float-glyphs { position: fixed; inset: 0; pointer-events: none; z-index: 45; }
.float-glyph {
  position: fixed;
  top: 0;
  left: 0;
  background-color: #fff;
  -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat;
  -webkit-mask-position: center; mask-position: center;
  -webkit-mask-size: contain; mask-size: contain;
  transform: translate(-50%, -50%);
  will-change: transform;
  opacity: 0.9;
}
.float-glyph[data-g="w"] { width: 50px; height: 38px; -webkit-mask-image: url(/assets/logo/logo-1-W.svg); mask-image: url(/assets/logo/logo-1-W.svg); }
.float-glyph[data-g="4"] { width: 22px; height: 48px; -webkit-mask-image: url(/assets/logo/logo-2-4.svg); mask-image: url(/assets/logo/logo-2-4.svg); }
.float-glyph[data-g="s"] { width: 18px; height: 30px; -webkit-mask-image: url(/assets/logo/logo-3-S.svg); mask-image: url(/assets/logo/logo-3-S.svg); }
@media (hover: none), (pointer: coarse) { .float-glyphs { display: none; } }

/* ---------- scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- contact page / form ---------- */
.contact-page { align-content: start; }
.contact-page-body { max-width: 560px; }
.contact-form { display: flex; flex-direction: column; gap: clamp(1.2rem, 2.5vw, 1.6rem); margin-top: clamp(1rem, 2vw, 1.5rem); }
.contact-form .hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.field { display: flex; flex-direction: column; gap: 0.55rem; }
.field label { font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase; color: #fff; }
.field input, .field textarea {
  width: 100%;
  background: transparent;
  border: 1px solid var(--line);
  color: #fff;
  padding: 0.85em 1em;
  font-family: inherit;
  font-size: 1rem;
  border-radius: 0;
  transition: border-color 0.3s var(--ease);
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--fg); }
.field input::placeholder, .field textarea::placeholder { color: rgba(255, 255, 255, 0.4); }
.field textarea { resize: vertical; min-height: 150px; line-height: 1.7; }
.form-error { color: #fff; font-size: 0.85rem; border-left: 2px solid #fff; padding-left: 0.8em; }
.form-thanks { color: #fff; font-size: clamp(1.1rem, 2.2vw, 1.55rem); line-height: 1.7; font-weight: 300; max-width: 24em; margin-bottom: clamp(1.5rem, 3vw, 2.5rem); }
.form-submit { align-self: flex-start; margin-top: 0.4rem; }
button.btn { background: transparent; cursor: pointer; font-family: inherit; }
.contact-btn { justify-self: start; }

/* ---------- responsive ---------- */
/* タブレット以下は Works を早めに1カラム（SPレイアウト）へ */
@media (max-width: 1024px) {
  .work-card--feature { grid-template-columns: 1fr; }
  .work-media { aspect-ratio: 16 / 9; }
  .work-info { padding: clamp(1.4rem, 4vw, 2rem); }
}
@media (max-width: 820px) {
  .section {
    grid-template-columns: 1fr;
    row-gap: 1.4rem;
    padding-block: clamp(3.5rem, 9vh, 6rem);
  }
  .section-label { grid-row: auto; }
  .section > :not(.section-label) { grid-column: 1; }
  .news-feature { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .hero-logo-stack { width: 72vw; height: clamp(170px, 34vh, 300px); }
  /* SPは拡大率を抑えて画面内に収める */
  .hero-logo:nth-child(2), .hero-logo:nth-child(3) { --s: 1.08; }
  .hero-logo:nth-child(4), .hero-logo:nth-child(5), .hero-logo:nth-child(6) { --s: 1.2; }
  .social-handle { display: none; }
  .site-footer { flex-direction: column; align-items: flex-start; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  .reveal { opacity: 1; transform: none; }
  .hero-scroll-line { animation: none; opacity: 0.4; }
}