/* Base palette: 4 colors only. Night flips --bg and --line-c; the derived
   tones below recompute automatically, so no per-theme redefinition needed. */
:root {
  color-scheme: light;
  --bg: #ffffff;
  --line-a: #a4d4ec;
  --line-b: #9499a2;
  --line-c: #404040;
  --text: color-mix(in srgb, var(--line-c) 72%, var(--bg));
  --hair: color-mix(in srgb, var(--line-b) 35%, var(--bg));
  --panel: color-mix(in srgb, var(--bg) 82%, transparent);
}

:root[data-theme="night"] {
  color-scheme: dark;
  --bg: #404040;
  --line-c: #ffffff;
}

* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; }
body {
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  font-size: 14px;
  line-height: 1.85;
}
button, input { font: inherit; }
a {
  color: var(--line-c);
  text-decoration: none;
  border-bottom: 2px solid var(--line-a);
}
a:hover { border-bottom-color: var(--line-b); }
img { display: block; }

.frame {
  height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: 26px clamp(22px, 5vw, 64px) 30px;
}
.top {
  flex: none;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 22px;
}
.site-name {
  margin: 0;
  color: var(--line-c);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: .08em;
}
.nav { display: flex; gap: clamp(15px, 3vw, 34px); }
.nav a {
  padding-bottom: 1px;
  border-bottom-color: transparent;
  color: var(--text);
  font-size: 13px;
  letter-spacing: .1em;
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--line-c); }
.nav a[aria-current="page"] { border-bottom-color: var(--line-a); }

.stage { position: relative; flex: 1; min-height: 0; }
.panel { position: absolute; inset: 0; outline: none; }
.panel[hidden] { display: none !important; }

.panel-about { display: flex; align-items: center; }
.about-cols {
  display: grid;
  grid-template-columns: minmax(240px, 5fr) 7fr;
  gap: clamp(28px, 6vw, 90px);
  width: min(100%, 1060px);
  margin: 0 auto;
}
.h {
  margin: 0 0 18px;
  color: var(--line-c);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .2em;
}
.about-text { max-width: 40em; margin: 0 0 12px; }
.contact { margin: 22px 0 0; }
.h-sub {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .18em;
}
.list-block + .list-block { margin-top: 24px; }
.flat-list { margin: 0; padding: 0; list-style: none; }
.flat-list li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 4px 0;
  border-bottom: 1px solid var(--hair);
  font-size: 12px;
  line-height: 1.7;
}
.flat-list .y {
  flex: none;
  opacity: .75;
  font-size: 11px;
  letter-spacing: .06em;
}

.panel-works { display: flex; }
.works-layout {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(200px, 3fr);
  gap: clamp(24px, 4vw, 56px);
  width: 100%;
  align-items: center;
}
.works-view {
  min-width: 0;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
#works-image {
  width: min(100%, calc(100dvh - 170px));
  max-height: calc(100dvh - 170px);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 2px solid var(--line-b);
  color: var(--text);
  font-size: 11px;
  letter-spacing: .18em;
}
.works-side { display: flex; flex-direction: column; gap: 10px; }
.works-counter {
  margin: 0;
  font-size: 12px;
  letter-spacing: .3em;
}
.works-ctrl { display: flex; gap: 8px; }
.step-btn {
  width: 30px;
  height: 30px;
  padding: 0;
  border: 2px solid var(--line-b);
  background: transparent;
  color: var(--line-c);
  cursor: pointer;
}
.step-btn:hover { border-color: var(--line-a); }
.works-thumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: flex-end;
  max-width: 300px;
}
.works-thumb {
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--line-b);
  background: transparent;
  color: var(--text);
  font-size: 9px;
  opacity: .55;
  cursor: pointer;
}
.works-thumb:hover { opacity: .85; }
.works-thumb.is-current {
  opacity: 1;
  outline: 2px solid var(--line-a);
  outline-offset: 2px;
}
.panel-links {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-left: clamp(0px, 8vw, 120px);
}
.links-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(130px, 220px));
  gap: 11px 28px;
  max-height: 62vh;
  margin: 0;
  padding: 0;
  list-style: none;
}
.links-list a { font-size: 13px; letter-spacing: .1em; }

.theme-toggle {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}
.theme-toggle:focus-visible {
  outline: 2px solid var(--line-a);
  outline-offset: 2px;
}

@media (max-width: 760px) {
  body { overflow: auto; }
  .frame { min-height: 100dvh; height: auto; padding: 20px 18px 28px; }
  .top { align-items: flex-start; }
  .site-name { font-size: 18px; }
  .nav { flex-wrap: wrap; justify-content: flex-end; gap: 8px 15px; }
  .stage { min-height: calc(100dvh - 92px); }
  .panel { position: relative; min-height: calc(100dvh - 92px); }
  .about-cols { grid-template-columns: 1fr; padding: 48px 0; }
  .works-layout { grid-template-columns: 1fr; padding: 34px 0 54px; }
  .works-view { height: auto; }
  #works-image { width: min(100%, 58vh); max-height: 58vh; }
  .panel-links { padding: 42px 0; }
  .links-list { grid-template-columns: repeat(2, minmax(0, 1fr)); max-height: none; }
}