/* ===== stp.works — リニューアル（案B：白の作品目録） ===== */
:root {
  --ground: #f6f5f1;           /* 地の色 */
  --paper: #ffffff;            /* 白帯（STUDIO / ABOUT） */
  --ink: #1c1b19;
  --sub: #5f5b53;              /* 補足テキスト */
  --line: #dcd8cf;
  --sq-dark: #8c8981;          /* ロゴの四角（濃） */
  --sq-light: #c8c5bd;         /* ロゴの四角（淡） */
  --switch: #e60012;
  --content: 1280px;
  --gutter: 80px;
  --header-h: 88px;
  --font-latin: "Jost", "Zen Kaku Gothic New", sans-serif;
  --font-body: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--ground); color: var(--ink); font-family: var(--font-body); font-weight: 500; font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.inner { max-width: calc(var(--content) + var(--gutter) * 2); margin: 0 auto; padding: 0 var(--gutter); }

/* ---- ロゴの「重なった四角」モチーフ ---- */
.squares { position: relative; display: inline-block; flex: none; width: 22px; height: 18px; }
.squares span { position: absolute; border: 1.5px solid var(--ink); }
.squares span:nth-child(1) { left: 0; top: 0; width: 9px; height: 9px; background: var(--sq-dark); }
.squares span:nth-child(2) { left: 5px; top: 4px; width: 10px; height: 10px; background: var(--sq-light); }
.squares span:nth-child(3) { left: 10px; top: 6px; width: 12px; height: 12px; background: #fff; }

/* ---- header ---- */
.site-header { position: sticky; top: 0; z-index: 20; background: var(--ground); border-bottom: 1px solid var(--line); }
.header-inner { position: relative; height: var(--header-h); display: flex; align-items: center; justify-content: space-between; }
.logo { margin: 0; line-height: 0; }
.logo a { display: block; }
.logo img { width: 220px; }
.menu { display: flex; align-items: center; gap: 36px; }
.site-nav { display: flex; gap: 36px; }
.site-nav a { padding: 12px 0; font-family: var(--font-latin); font-weight: 500; font-size: 14px; letter-spacing: .22em; }
.site-nav a:hover { color: var(--sub); }
.menu-sep { width: 1px; height: 24px; background: var(--line); }
.header-social { display: flex; gap: 10px; }
.header-social a:hover { opacity: .75; }
.header-social img { width: 28px; height: 28px; }
.menu-toggle { display: none; }

/* ---- buttons ---- */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 0 14px; font-weight: 700; white-space: nowrap; transition: opacity .15s; }
.btn:hover { opacity: .8; }
.btn-steam { background: var(--ink); color: var(--ground); }
.btn-switch { background: var(--switch); color: #fff; }

/* ---- hero（最新作） ---- */
.hero { padding: 72px 0 96px; }
.hero-inner { display: grid; grid-template-columns: minmax(0, 440px) minmax(0, 760px); justify-content: space-between; align-items: center; gap: 48px; }
.hero-label { margin: 0; display: flex; align-items: center; gap: 12px; font-family: var(--font-latin); font-weight: 500; font-size: 13px; letter-spacing: .24em; color: var(--sub); }
.hero-title { margin: 20px 0 0; font-size: 44px; font-weight: 700; line-height: 1.3; }
.hero-date { margin: 10px 0 0; font-family: var(--font-latin); font-weight: 400; letter-spacing: .06em; }
.hero-desc { margin: 22px 0 0; font-size: 15px; line-height: 1.9; color: var(--sub); }
.meta { margin: 28px 0 0; border-top: 1px solid var(--line); }
.meta div { display: flex; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.meta dt { flex: none; width: 72px; color: var(--sub); }
.meta dd { margin: 0; }
.hero-buttons { margin-top: 28px; display: flex; gap: 12px; }
.hero-buttons .btn { flex: 1 1 0; height: 48px; font-size: 14px; }
/* キービジュアル */
.kv { aspect-ratio: 16 / 9; }
.kv img { width: 100%; height: 100%; object-fit: cover; border: 3px solid var(--ink); background: #000; }

/* ---- works（年表） ---- */
.works { padding: 112px 0 120px; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; }
.section-title { margin: 0; font-family: var(--font-latin); font-weight: 500; font-size: 64px; letter-spacing: .08em; line-height: 1; }
.section-note { margin: 0; font-size: 15px; color: var(--sub); }
.years { margin-top: 56px; border-bottom: 1px solid var(--ink); }
.year { display: flex; padding: 36px 0; border-top: 1px solid var(--ink); }
.year-label { flex: none; width: 240px; margin: 0; font-family: var(--font-latin); font-weight: 300; font-size: 56px; line-height: 1; }
.year-works { flex: 1; min-width: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 40px; }
.work { display: flex; gap: 20px; align-items: flex-start; }
.work-img { flex: none; width: 256px; aspect-ratio: 16 / 9; object-fit: cover; border: 1px solid var(--line); }
.work-body { min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.work-date { margin: 0; font-family: var(--font-latin); font-size: 13px; letter-spacing: .06em; color: var(--sub); }
.work-title { margin: 0; font-size: 18px; font-weight: 700; line-height: 1.4; }
.work-platforms { margin: 0; font-size: 13px; color: var(--sub); }
.work-buttons { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 8px; }
.work-buttons .btn { height: 34px; font-size: 13px; }
.work-buttons .btn-steam { background: transparent; color: var(--ink); border: 1.5px solid var(--ink); }

/* ---- about ---- */
.about { padding: 112px 0; background: var(--paper); border-top: 1px solid var(--line); }
.about-inner { display: flex; gap: 80px; }
.about-head { flex: none; width: 440px; }
.about-head .section-note { margin-top: 14px; }
.about-body { flex: 1; min-width: 0; }
.about-list { margin: 0; border-top: 1px solid var(--ink); }
.about-list div { display: flex; padding: 20px 0; border-bottom: 1px solid var(--line); }
.about-list dt { flex: none; width: 160px; color: var(--sub); }
.about-list dd { margin: 0; }
.sns { margin-top: 40px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.sns a { height: 64px; padding: 0 16px; display: flex; align-items: center; gap: 12px; border: 1px solid var(--line); font-size: 15px; transition: border-color .15s; }
.sns a:hover { border-color: var(--ink); }
.sns img { width: 32px; height: 32px; }

/* ---- footer ---- */
.site-footer { padding: 48px 0; border-top: 1px solid var(--line); }
.footer-inner { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.footer-logo { width: 160px; }
.footer-links { display: flex; gap: 36px; font-size: 13px; color: var(--sub); }
.footer-links a:hover { text-decoration: underline; }
.copyright { margin: 0; font-family: var(--font-latin); font-size: 13px; letter-spacing: .06em; color: var(--sub); }

/* ---- 中間幅（ノートPC・タブレット横） ---- */
@media (max-width: 1200px) {
  :root { --gutter: 40px; }
  .hero-inner { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
  .year-label { width: 160px; font-size: 44px; }
  .year-works { grid-template-columns: minmax(0, 1fr); }
  .about-inner { gap: 48px; }
  .about-head { width: 280px; }
  .sns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---- スマホ・タブレット縦 ---- */
@media (max-width: 960px) {
  :root { --gutter: 20px; --header-h: 60px; }
  .logo img { width: 153px; }
  .menu-toggle { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; margin-right: -12px; padding: 0; border: 0; background: transparent; color: var(--ink); cursor: pointer; }
  .menu-toggle .icon-close, .site-header.is-open .menu-toggle .icon-open { display: none; }
  .site-header.is-open .menu-toggle .icon-close { display: block; }
  .menu { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; align-items: stretch; gap: 0; padding: 4px var(--gutter) 20px; background: var(--ground); border-bottom: 1px solid var(--line); }
  .site-header.is-open .menu { display: flex; }
  .site-nav { flex-direction: column; gap: 0; }
  .site-nav a { display: block; padding: 14px 0; border-bottom: 1px solid var(--line); }
  .menu-sep { display: none; }
  .header-social { padding-top: 16px; gap: 14px; }
  .header-social img { width: 36px; height: 36px; }

  .hero { padding: 32px 0 48px; }
  .hero-inner { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .kv { order: -1; width: 100%; max-width: 640px; }
  .kv img { border-width: 2px; }
  .hero-label { gap: 10px; font-size: 12px; }
  .hero-title { margin-top: 14px; font-size: 32px; }
  .hero-date { margin-top: 6px; font-size: 15px; }
  .hero-desc { margin-top: 16px; font-size: 14px; line-height: 1.85; }
  .hero-buttons { margin-top: 22px; flex-direction: column; gap: 10px; }
  .hero-buttons .btn { flex: none; }

  .works { padding: 48px 0 40px; }
  .section-title { font-size: 40px; }
  .section-note { font-size: 12px; }
  .years { margin-top: 24px; }
  .year { flex-direction: column; gap: 16px; padding: 24px 0; }
  .year-label { width: auto; font-size: 36px; }
  .year-works { gap: 16px; }
  .work { gap: 14px; }
  .work-img { width: clamp(136px, 30vw, 256px); }
  .work-body { gap: 4px; }
  .work-date { font-size: 12px; }
  .work-title { font-size: 15px; line-height: 1.45; }
  .work-platforms { font-size: 12px; }
  .work-buttons { margin-top: 4px; gap: 6px; }
  .work-buttons .btn { height: 32px; padding: 0 12px; font-size: 12px; }
  .hide-sp { display: none; }

  .about { padding: 48px 0; }
  .about-inner { flex-direction: column; gap: 24px; }
  .about-head { width: auto; }
  .about-list div { padding: 16px 0; font-size: 15px; }
  .about-list dt { width: 104px; }
  .sns { margin-top: 28px; gap: 10px; }
  .sns a { height: 56px; padding: 0 12px; gap: 10px; font-size: 14px; }

  .site-footer { padding: 32px 0 40px; }
  .footer-inner { flex-direction: column; align-items: center; gap: 16px; text-align: center; }
  .footer-links { gap: 28px; }
}