:root {
  --bg: #f2ede5;
  --surface: rgba(255, 252, 246, 0.8);
  --surface-strong: rgba(255, 252, 246, 0.94);
  --panel: rgba(245, 237, 228, 0.74);
  --text: #162132;
  --muted: #5d6979;
  --line: rgba(22, 33, 50, 0.1);
  --line-strong: rgba(22, 33, 50, 0.16);
  --accent: #c45a30;
  --accent-strong: #923817;
  --accent-soft: rgba(196, 90, 48, 0.12);
  --shadow: 0 28px 80px rgba(44, 31, 22, 0.12);
}

body.is-cool {
  --bg: #e9f0f2;
  --surface: rgba(248, 253, 255, 0.82);
  --surface-strong: rgba(255, 255, 255, 0.95);
  --panel: rgba(234, 245, 247, 0.78);
  --text: #152334;
  --muted: #536576;
  --line: rgba(21, 35, 52, 0.1);
  --line-strong: rgba(21, 35, 52, 0.16);
  --accent: #177a7e;
  --accent-strong: #0f5f62;
  --accent-soft: rgba(23, 122, 126, 0.12);
  --shadow: 0 28px 80px rgba(18, 42, 50, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.92), transparent 28%),
    radial-gradient(circle at 88% 10%, var(--accent-soft), transparent 24%),
    linear-gradient(180deg, #f8f3eb 0%, var(--bg) 50%, #e8e2d7 100%);
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.18) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.38), transparent 68%);
}

.site-shell,
.gallery {
  width: min(1220px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-shell {
  padding: 1.25rem 0 4rem;
}

.topbar,
.masthead,
.gallery__intro,
.swf-card,
.djvu-list,
.djvu-viewer-card {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.topbar {
  position: sticky;
  top: 1rem;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: linear-gradient(180deg, var(--surface-strong), var(--surface));
}

.brand-kicker,
.eyebrow {
  margin: 0 0 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.74rem;
  color: var(--muted);
}

.brand-block h1 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 0.94;
}

.topbar__nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.topbar__nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.topbar__nav a:hover,
.topbar__nav a:focus-visible {
  background: var(--accent-soft);
  border-color: var(--line);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1.04;
  margin-bottom: 0.8rem;
}

.intro,
.section-copy {
  max-width: 62ch;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 1rem;
  margin-top: 1rem;
  padding: 1.35rem;
  background:
    linear-gradient(135deg, var(--surface-strong), rgba(255, 255, 255, 0.56)),
    radial-gradient(circle at top right, var(--accent-soft), transparent 35%);
}

.masthead__copy {
  padding: 0.9rem 1rem;
}

.masthead__panel {
  display: grid;
  gap: 0.85rem;
  align-content: start;
  padding: 0.35rem;
}

.metric {
  padding: 1.1rem 1.15rem;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--surface-strong), var(--panel));
}

.metric__value {
  display: block;
  font-size: 2.35rem;
  font-weight: 700;
  line-height: 1;
}

.metric__label {
  color: var(--muted);
}

.button {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.8rem 1.15rem;
  font: inherit;
  cursor: pointer;
  background: var(--surface-strong);
  color: var(--text);
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  border-color: var(--accent);
  background: #fff;
}

.gallery {
  display: grid;
  gap: 1rem;
  padding-top: 1rem;
}

.gallery__intro {
  padding: 1.4rem 1.5rem;
  background: linear-gradient(180deg, var(--surface-strong), var(--surface));
}

.gallery__intro p {
  margin-bottom: 0;
}

.djvu-layout {
  display: grid;
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
  gap: 1rem;
}

.djvu-list,
.djvu-viewer-card {
  padding: 1.1rem;
}

.djvu-list {
  display: grid;
  align-content: start;
  gap: 0.75rem;
  background: linear-gradient(180deg, var(--surface-strong), var(--surface));
}

.djvu-book {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.74), rgba(255, 255, 255, 0.54));
  color: var(--text);
  padding: 1rem 1.05rem;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease, box-shadow 180ms ease;
}

.djvu-book:hover,
.djvu-book:focus-visible,
.djvu-book.is-active {
  transform: translateY(-1px);
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.72));
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.06);
}

.djvu-book__name,
.djvu-book__path {
  display: block;
}

.djvu-book__name {
  font-weight: 700;
}

.djvu-book__path {
  margin-top: 0.3rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.djvu-viewer-card {
  background: linear-gradient(180deg, var(--surface-strong), var(--surface));
}

.djvu-viewer__meta {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--line);
}

.djvu-viewer__meta h3,
.djvu-viewer__meta p {
  margin-bottom: 0;
}

.djvu-viewer__meta p {
  color: var(--muted);
}

.djvu-viewer {
  overflow: hidden;
  border-radius: 20px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(244, 238, 229, 0.72));
  min-height: 75vh;
}

.swf-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1rem;
}

.swf-card {
  padding: 1rem;
  background: linear-gradient(180deg, var(--surface-strong), var(--surface));
}

.swf-card h3 {
  margin: 0 0 0.3rem;
  font-size: 1.08rem;
}

.swf-card p {
  margin: 0 0 0.95rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.swf-player {
  overflow: hidden;
  border-radius: 20px;
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.64), rgba(245, 239, 231, 0.86)),
    radial-gradient(circle at top right, var(--accent-soft), transparent 28%);
  min-height: 240px;
}

.swf-player ruffle-player,
.swf-player embed,
.swf-player object,
.swf-player iframe {
  display: block;
  width: 100%;
  min-height: 240px;
}

@media (max-width: 860px) {
  .site-shell,
  .gallery {
    width: min(1220px, calc(100% - 1rem));
  }

  .topbar {
    position: static;
    flex-direction: column;
    align-items: start;
  }

  .topbar__nav,
  .masthead,
  .djvu-layout,
  .djvu-viewer__meta {
    display: grid;
  }

  .masthead,
  .djvu-layout {
    grid-template-columns: 1fr;
  }

  .djvu-viewer {
    min-height: 60vh;
  }

  .brand-block h1,
  h2 {
    line-height: 1.02;
  }
}