:root {
  --bg: #f5f4f1;
  --surface: #ffffff;
  --surface-2: #eeece7;
  /* Mid-tone so both white and black filament stay visible on the transparent plate renders. */
  --thumb: radial-gradient(circle at 50% 42%, #f7f6f3 0%, #d8d5cd 85%);
  --text: #1f1e1c;
  --muted: #6d6a64;
  --border: #e2dfd8;
  --accent: #2f6fde;
  --accent-soft: #e4edfc;
  --warn: #b4441c;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.05), 0 4px 14px rgb(0 0 0 / 0.04);
  --radius: 12px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131416;
    --surface: #1b1c1f;
    --surface-2: #24262a;
    --thumb: radial-gradient(circle at 50% 42%, #6b6e74 0%, #45484e 85%);
    --text: #ebeae6;
    --muted: #9b9891;
    --border: #2d2f34;
    --accent: #7ea8ff;
    --accent-soft: #1e2a42;
    --warn: #f08a5d;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.3);
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1 { font-size: 1.6rem; margin: 0.2rem 0 1.25rem; letter-spacing: -0.01em; }

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

/* Top bar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { display: flex; align-items: center; gap: 0.55rem; color: var(--text); font-weight: 650; }
.brand:hover { text-decoration: none; }
.brand svg { color: var(--accent); }
.topbar-stats { color: var(--muted); font-size: 0.85rem; white-space: nowrap; }

/* Shell: folder tree + content */
.shell {
  flex: 1;
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr);
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
}

.sidebar {
  border-right: 1px solid var(--border);
  padding: 1rem 0.5rem 2rem 1rem;
  position: sticky;
  top: 49px;
  align-self: start;
  max-height: calc(100vh - 49px);
  overflow-y: auto;
}

.tree-panel > summary {
  list-style: none;
  font-size: 0.75rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding: 0 0.5rem 0.5rem;
  cursor: default;
}
.tree-panel > summary::-webkit-details-marker { display: none; }

.tree ul { list-style: none; margin: 0; padding-left: 0.9rem; }
.tree > ul { padding-left: 0; }
.tree summary { list-style: none; cursor: pointer; }
.tree summary::-webkit-details-marker { display: none; }

.tree summary,
.tree .leaf {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.18rem 0.5rem;
  border-radius: 7px;
}

.tree summary::before {
  content: "";
  width: 0.4rem;
  height: 0.4rem;
  flex: none;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: rotate(-45deg);
  margin: 0 0.15rem 0 -0.05rem;
  transition: transform 0.15s;
}
.tree details[open] > summary::before { transform: rotate(45deg); }
.tree .leaf { padding-left: 1.15rem; }
.tree .leaf.root { padding-left: 0.5rem; font-weight: 600; }

.tree a {
  color: var(--text);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.tree a[aria-current="page"] { color: var(--accent); font-weight: 600; }
.tree summary:has(a[aria-current="page"]),
.tree .leaf:has(a[aria-current="page"]) { background: var(--accent-soft); }
.tree .count { color: var(--muted); font-size: 0.78rem; font-variant-numeric: tabular-nums; }

/* Content */
.content { padding: 1.25rem 1.5rem 3rem; min-width: 0; }

.crumbs { display: flex; flex-wrap: wrap; gap: 0.35rem; font-size: 0.85rem; color: var(--muted); }
.crumbs a { color: var(--muted); }
.crumbs [aria-current] { color: var(--text); }

section + section { margin-top: 2rem; }

.section-title {
  font-size: 0.78rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0 0.75rem;
}
.section-title span { font-weight: 500; margin-left: 0.25rem; }

.notice {
  background: var(--accent-soft);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
}

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

/* Folder tiles */
.folder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 0.9rem;
}

.folder-tile {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform 0.12s, border-color 0.12s;
}
.folder-tile:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-1px); }

.mosaic {
  display: grid;
  aspect-ratio: 4 / 3;
  background: var(--thumb);
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
}
.mosaic img { width: 100%; height: 100%; object-fit: contain; min-height: 0; }
.mosaic--1 { grid-template-columns: 1fr; grid-template-rows: 1fr; }
.mosaic--2 { grid-template-rows: 1fr; }
.mosaic--3 img:first-child { grid-row: span 2; }
.mosaic--0 { display: flex; align-items: center; justify-content: center; }
.folder-icon { width: 46px; height: 46px; color: var(--muted); opacity: 0.45; }

.folder-meta { display: flex; flex-direction: column; padding: 0.55rem 0.75rem 0.65rem; }
.folder-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.folder-meta .muted { font-size: 0.8rem; }

/* Model cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 1rem;
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.card-thumb {
  position: relative;
  aspect-ratio: 1;
  background: var(--thumb);
}
.card-thumb img { width: 100%; height: 100%; object-fit: contain; display: block; }

.placeholder {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  color: var(--muted);
  font-size: 0.8rem;
  padding: 1rem;
  text-align: center;
}
.placeholder svg { width: 54px; height: 54px; opacity: 0.4; }

.badge,
.kind {
  position: absolute;
  top: 0.55rem;
  font-size: 0.7rem;
  font-weight: 650;
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  background: rgb(0 0 0 / 0.62);
  color: #fff;
  backdrop-filter: blur(4px);
}
.badge { left: 0.55rem; }
.kind { right: 0.55rem; letter-spacing: 0.04em; }
.kind--stl { background: rgb(116 74 186 / 0.85); }

.card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.7rem 0.8rem 0.75rem;
  border-top: 1px solid var(--border);
}
.card-body h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 620;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-body p { margin: 0; font-size: 0.8rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-name { color: var(--muted); font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 0.72rem !important; }

.card-foot {
  margin-top: auto;
  padding-top: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.swatches { display: flex; flex-wrap: wrap; gap: 3px; min-width: 0; }
.swatches circle { stroke: var(--text); stroke-opacity: 0.18; stroke-width: 1; }

.download {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  font-weight: 550;
  white-space: nowrap;
  padding: 0.25rem 0.55rem;
  border-radius: 7px;
  background: var(--accent-soft);
}
.download:hover { text-decoration: none; filter: brightness(0.97); }

/* Other files */
.file-list {
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.file-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.8rem;
}
.file-list li + li { border-top: 1px solid var(--border); }
.file-thumb { width: 40px; height: 40px; object-fit: cover; border-radius: 6px; background: var(--surface-2); flex: none; }
.file-icon {
  width: 40px;
  height: 40px;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  overflow: hidden;
}
.file-list-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Footer */
.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding: 0.8rem 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8rem;
}
.footer form { margin: 0; }
.link-button {
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  color: var(--accent);
  cursor: pointer;
}
.link-button:hover { text-decoration: underline; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.lead { margin: -0.75rem 0 1.5rem; }

/* Top bar search and navigation */
.topbar-search {
  flex: 1;
  max-width: 420px;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0 0.7rem;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface-2);
  color: var(--muted);
}
.topbar-search:focus-within { border-color: var(--accent); }
.topbar-search input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: none;
  color: var(--text);
  font: inherit;
  padding: 0.42rem 0;
  outline: none;
}
.topbar-nav { display: flex; align-items: center; gap: 1rem; }
.topbar-nav a { color: var(--text); font-weight: 550; font-size: 0.9rem; }

/* Pages without the folder tree */
.shell--wide { grid-template-columns: minmax(0, 1fr); max-width: 1400px; }

/* Cards are links now */
a.card-thumb { display: block; }
a.card-thumb:hover img { transform: scale(1.03); }
.card-thumb img { transition: transform 0.2s ease; }
.card-body h3 a { color: inherit; }
.card-folder a { color: var(--muted); font-size: 0.75rem; }

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.95rem;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
}
.button:hover { text-decoration: none; filter: brightness(0.97); }
.button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) {
  .button.primary { color: #0d1526; }
}

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}
.icon-button:hover { text-decoration: none; border-color: var(--accent); }
.icon-button.disabled { opacity: 0.35; }

/* File page */
.file-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin: 0.4rem 0 1.25rem;
}
.file-title { min-width: 0; }
.file-title h1 { margin: 0; }
.file-title .file-name { margin: 0.25rem 0 0; font-size: 0.8rem; color: var(--muted); }
.file-actions { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.pager { display: flex; align-items: center; gap: 0.4rem; }
.pager-count { color: var(--muted); font-size: 0.8rem; font-variant-numeric: tabular-nums; min-width: 3.5em; text-align: center; }

.file-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 1.5rem;
  align-items: start;
}

.stage {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.stage > img,
.stage > .placeholder {
  display: block;
  width: 100%;
  height: auto;
  max-height: 68vh;
  aspect-ratio: 1;
  object-fit: contain;
  background: var(--thumb);
}
.stage figcaption {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding: 0.6rem 0.9rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
}

.stage-3d {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-height: 68vh;
  background: var(--thumb);
  cursor: grab;
  touch-action: none;
}
.stage-3d:active { cursor: grabbing; }
.stage-3d[hidden],
.stage > img[hidden] { display: none; }
.stage-3d canvas { display: block; width: 100%; height: 100%; }
.stage-status {
  position: absolute;
  inset: auto 0 1rem;
  margin: 0 auto;
  width: max-content;
  max-width: calc(100% - 2rem);
  padding: 0.45rem 0.8rem;
  border-radius: 8px;
  background: rgb(0 0 0 / 0.6);
  color: #fff;
  font-size: 0.82rem;
  text-align: center;
}
.stage-status:empty { display: none; }
.stage figcaption { align-items: center; }
.stage-meta { display: inline-flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.toggle-3d {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem 0.65rem;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--accent-soft);
  color: var(--accent);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 650;
  cursor: pointer;
}
.toggle-3d[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) {
  .toggle-3d[aria-pressed="true"] { color: #0d1526; }
}

.plate-strip {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0 0 0.25rem;
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
}
.plate-thumb {
  position: relative;
  display: block;
  width: 76px;
  height: 76px;
  border-radius: 9px;
  border: 2px solid transparent;
  background: var(--thumb);
  overflow: hidden;
}
.plate-thumb img { width: 100%; height: 100%; object-fit: contain; display: block; }
.plate-thumb span {
  position: absolute;
  left: 4px;
  bottom: 3px;
  font-size: 0.68rem;
  font-weight: 700;
  color: #fff;
  background: rgb(0 0 0 / 0.55);
  border-radius: 5px;
  padding: 0 0.3rem;
}
.plate-thumb[aria-current] { border-color: var(--accent); }
.plate-thumb:hover { border-color: var(--border); text-decoration: none; }
.plate-thumb[aria-current]:hover { border-color: var(--accent); }
.plate-objects { margin: 0.6rem 0 0; font-size: 0.85rem; }

.facts {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  box-shadow: var(--shadow);
}
.facts dl { margin: 0; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 0.45rem 1rem; font-size: 0.88rem; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; overflow-wrap: anywhere; }
.facts .warn { font-size: 0.85rem; margin: 0.75rem 0 0; }

.file-page section { margin-top: 2rem; }

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.6rem;
}
.photo-grid a {
  display: block;
  aspect-ratio: 4 / 3;
  border-radius: 10px;
  overflow: hidden;
  background: var(--surface-2);
}
.photo-grid img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.2s ease; }
.photo-grid a:hover img { transform: scale(1.03); }

.prose {
  max-width: 75ch;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem 1.4rem 1rem;
  line-height: 1.6;
}
.prose h1, .prose h2, .prose h3, .prose h4, .prose h5, .prose h6 { font-size: 1.05rem; margin: 1.3rem 0 0.4rem; }
.prose p { margin: 0.6rem 0; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose table { border-collapse: collapse; }
.prose th, .prose td { border: 1px solid var(--border); padding: 0.3rem 0.6rem; }

.lightbox {
  border: 0;
  padding: 0;
  background: transparent;
  max-width: 100vw;
  max-height: 100vh;
  width: 100vw;
  height: 100vh;
}
.lightbox::backdrop { background: rgb(0 0 0 / 0.85); }
.lightbox[open] { display: flex; align-items: center; justify-content: center; }
.lightbox img { max-width: 92vw; max-height: 86vh; object-fit: contain; border-radius: 8px; }
.lightbox button {
  position: fixed;
  border: 0;
  background: rgb(255 255 255 / 0.12);
  color: #fff;
  font-size: 1.8rem;
  line-height: 1;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  cursor: pointer;
}
.lightbox button:hover { background: rgb(255 255 255 / 0.25); }
.lightbox-close { top: 16px; right: 16px; }
.lightbox-prev { left: 16px; top: calc(50% - 24px); }
.lightbox-next { right: 16px; top: calc(50% - 24px); }
.lightbox-count { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); color: #ddd; font-size: 0.85rem; }

/* Search */
.search-large { display: flex; gap: 0.6rem; max-width: 640px; margin-bottom: 1.75rem; }
.search-large input {
  flex: 1;
  min-width: 0;
  font: inherit;
  font-size: 1rem;
  padding: 0.55rem 0.8rem;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}
.search-large input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.folder-results {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.5rem;
}
.folder-results li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.8rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.88rem;
}
.folder-results a { display: flex; align-items: center; gap: 0.5rem; min-width: 0; color: var(--text); }
.folder-results a span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.folder-results svg { color: var(--muted); flex: none; }
.folder-results .muted { white-space: nowrap; font-size: 0.78rem; }

/* Session */
.logout-form { margin: 0; }
.session-pill {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  white-space: nowrap;
}

/* Login */
.login-page { display: flex; justify-content: center; padding-top: 8vh; }
.login-card {
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding: 1.75rem 1.6rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}
.login-card h1 { font-size: 1.3rem; margin: 0 0 0.25rem; }
.login-logo { color: var(--accent); }
.login-card label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.85rem; color: var(--muted); }
.login-card input[type="text"],
.login-card input[type="password"],
.login-card input:not([type]) {
  font: inherit;
  font-size: 1rem;
  color: var(--text);
  padding: 0.55rem 0.7rem;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--bg);
}
.login-card input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.login-card .remember { flex-direction: row; align-items: center; gap: 0.5rem; color: var(--text); }
.login-card .button { justify-content: center; margin-top: 0.25rem; }
.login-error { margin: 0; color: var(--warn); font-size: 0.88rem; }
.login-card .notice { margin: 0; font-size: 0.85rem; }

@media (max-width: 1000px) {
  .file-layout { grid-template-columns: minmax(0, 1fr); }
}

/* Phones and narrow windows */
@media (max-width: 800px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .topbar { flex-wrap: wrap; }
  .topbar-search { order: 3; flex-basis: 100%; max-width: none; }
  .topbar-stats { display: none; }
  .file-actions { width: 100%; justify-content: space-between; }
  .photo-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
  .prose { padding: 0.25rem 1rem 0.75rem; }
  .sidebar {
    position: static;
    max-height: none;
    border-right: 0;
    border-bottom: 1px solid var(--border);
    padding: 0.6rem 1rem;
  }
  .tree-panel > summary { cursor: pointer; padding: 0.25rem 0; }
  .tree-panel > summary::after { content: " ▾"; }
  .tree-panel[open] > summary::after { content: " ▴"; }
  .content { padding: 1rem 1rem 2.5rem; }
  .card-grid { grid-template-columns: repeat(auto-fill, minmax(155px, 1fr)); gap: 0.75rem; }
  .folder-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 0.75rem; }
  .topbar { padding: 0.65rem 1rem; }
}

/* First-run hint and account page */
.setup-banner {
  padding: 0.55rem 1.25rem;
  background: var(--accent-soft);
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}
.account-card { max-width: 420px; }
.account-card h2 { font-size: 1.05rem; margin: 0; }