:root {
  --ink: #333537;
  --ink-soft: #5c5f62;
  --paper: #fff;
  --line: rgba(51, 53, 55, 0.28);
  --font-en: "Avenir Next", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-ja: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;
  --doors-h: 40svh;
  /* not-here.jp の上部パネルで測った、文字の左と下の余白。1024px 幅で 40px / 53px、1280px 以上で 80px / 65px */
  --pad-x: 40px;
  --pad-b: 53px;
}

@media (min-width: 1280px) {
  :root { --pad-x: 80px; --pad-b: 65px; }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-en), var(--font-ja);
  font-size: 15px;
  line-height: 1.9;
  letter-spacing: 0.04em;
}

a { color: inherit; }

/* ---------- intro: name and one line ---------- */

.intro {
  min-height: calc(100svh - var(--doors-h) - 70px);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  gap: 10px;
  padding: 48px var(--pad-x) var(--pad-b);
  text-align: left;
}

.name {
  margin: 0;
  font-size: 36px;
  font-weight: 400;
  letter-spacing: 0.18em;
  line-height: 1.3;
}

.affiliation {
  margin: 0 0 14px;
  font-size: 22px;
  font-weight: 300;
  letter-spacing: 0.06em;
  line-height: 1.6;
}

.intro-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px 22px;
}

.intro-link {
  display: inline-flex;
  padding: 0;
  color: var(--ink-soft);
}

.intro-link svg { width: 22px; height: 22px; fill: currentColor; }

/* アイコンの名前は、カーソルを乗せるとすぐ出す（title 属性は表示が遅いため使わない） */
.intro-link { position: relative; }

.intro-link::after {
  content: attr(data-label);
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  padding: 3px 10px;
  background: var(--paper);
  border: 1px solid var(--line);
  color: var(--ink);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.7;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
}

.intro-link:hover::after, .intro-link:focus-visible::after { opacity: 1; }

.intro-link:hover, .intro-link:focus-visible { color: var(--ink); }

/* ---------- doors: three entrances ---------- */

.doors {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  height: var(--doors-h);
  border-top: 1px solid var(--line);
}

.door {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  gap: 10px;
  padding: 32px var(--pad-x) var(--pad-b);
  text-align: left;
  text-decoration: none;
  transition: background-color 0.25s;
}

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

.door { background: var(--paper); }

/* 背景画像。文字の読みやすさのため、下側に白のベールとぼかしを同じ範囲・同じ傾斜で重ねる */
/* ベールとぼかしの掛け方は、3つの入口で共通 */
.door { --veil-a: 35%; --veil-b: 78%; --blur: 10px; overflow: hidden; isolation: isolate; }

.door::before {
  content: "";
  position: absolute;
  inset: var(--bg-inset, 0);
  z-index: -2;
  background: var(--bg, none) var(--bg-pos, center) / var(--bg-size, cover) no-repeat;
  transition: opacity 0.25s;
}

/* 白のベールとぼかしは、同じマスク（同じ範囲・同じ傾斜）で重ねる */
.door::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: #fff;
  -webkit-backdrop-filter: blur(var(--blur));
  backdrop-filter: blur(var(--blur));
  -webkit-mask-image: linear-gradient(to top, #000 0%, rgba(0, 0, 0, 0.96) var(--veil-a), transparent var(--veil-b));
  mask-image: linear-gradient(to top, #000 0%, rgba(0, 0, 0, 0.96) var(--veil-a), transparent var(--veil-b));
  pointer-events: none;
}

.door:hover::before, .door:focus-visible::before { opacity: 0.88; }

.door-research { --bg: url("images/research.webp"); --bg-inset: 0 0 25% 25%; --bg-size: contain; --bg-pos: center; }
.door-dev { --bg: url("images/development.webp"); --bg-size: contain; }
.door-music { --bg: url("images/chamber-music.webp"); }
.door:hover, .door:focus-visible { background: #f5f5f4; }
.door:focus-visible { outline: 2px solid var(--ink); outline-offset: -6px; }

.door-label {
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 300;
  letter-spacing: 0.2em;
  line-height: 1.4;
}

.door-copy {
  font-size: clamp(10px, 1.25vw, 13px);
  letter-spacing: 0.08em;
  white-space: nowrap;
  color: var(--ink-soft);
}

.site-footer {
  padding: 20px 32px 28px;
  text-align: center;
  font-size: 11px;
  letter-spacing: 0.18em;
  border-top: 1px solid var(--line);
}

.site-footer a {
  color: inherit;
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

/* ---------- narrow screens ---------- */

@media (max-width: 900px) {
  .door-copy { font-size: 13px; }

  .doors { grid-template-columns: 1fr; height: auto; }
  .intro { min-height: 40svh; }
  .door { min-height: 34svh; padding: 28px var(--pad-x) var(--pad-b); }
  .door + .door { border-left: 0; border-top: 1px solid var(--line); }
}

@media (prefers-reduced-motion: reduce) {
  .door, .intro-link::after { transition: none; }
}