:root {
  color-scheme: light;
  --bg: #f4f4f5;
  --ink: #18181b;
  --muted: #71717a;
  --line: #e4e4e7;
  --card: #fff;
  --side: #fafafa;
  --acc: #3f3f46;
  --hover: #ececee;
  --active: #e4e4e7;
  --thumb: #ececee;
  --paper: #fff;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #18181b;
  --ink: #f4f4f5;
  --muted: #a1a1aa;
  --line: #3f3f46;
  --card: #27272a;
  --side: #141417;
  --acc: #d4d4d8;
  --hover: #27272a;
  --active: #3f3f46;
  --thumb: #3f3f46;
  --paper: #fafafa;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.4 system-ui, "Segoe UI", sans-serif;
}

body {
  display: grid;
  grid-template-columns: 15.5rem 1fr;
}

.sidebar {
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--side);
  border-right: 1px solid var(--line);
}

.brand {
  padding: 1rem 1rem 0.6rem;
}

h1, h2 {
  margin: 0;
  font-weight: 650;
}

h1 { font-size: 1.05rem; }
h2 { font-size: 1.2rem; padding: 0.2rem 0 0.35rem; }

.nav {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 0.25rem 0.6rem 0.8rem;
}

#folders,
#folders ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

#folders { margin-top: 0.35rem; }
#folders ul { padding-left: 0.85rem; }

.tree-row {
  display: flex;
  align-items: center;
  min-width: 0;
}

.tree-toggle {
  flex: 0 0 1.15rem;
  width: 1.15rem;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  line-height: 1;
  cursor: pointer;
}

button.tree-toggle:hover { color: var(--ink); }

.tree-row .nav-item { flex: 1; min-width: 0; }

.tree-row .nav-item .name {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-item {
  display: block;
  width: 100%;
  margin: 0 0 1px;
  padding: 0.42rem 0.6rem;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: inherit;
  text-align: left;
  font: inherit;
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-item:hover { background: var(--hover); }
.nav-item.active { background: var(--active); font-weight: 600; }
.nav-item.drop, .card.folder.drop { box-shadow: inset 0 0 0 2px var(--acc); }

.tools {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 0.75rem 1rem 1rem;
  border-top: 1px solid var(--line);
}

#refresh, .viewer-bar button, #theme, #upload, .seg button {
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--card);
  color: inherit;
  font: inherit;
  cursor: pointer;
}

#refresh:hover, .viewer-bar button:hover, #theme:hover, #upload:hover {
  background: var(--bg);
}

.app {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

.bar {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  padding: 0.85rem 1.25rem 0.65rem;
}

#search { flex: 1; min-width: 8rem; margin: 0; }

.bar-tools {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  flex-wrap: wrap;
}

.seg {
  display: flex;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.seg button {
  border: 0;
  border-radius: 0;
  border-right: 1px solid var(--line);
}

.seg button:last-child { border-right: 0; }
.seg button.active { background: var(--active); font-weight: 600; }

#q {
  width: 100%;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  font: inherit;
}

.main {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 0.4rem 1.25rem 1.5rem;
}

#view-stats { margin: 0 0 0.2rem; }
#ocr-hint { margin: 0 0 0.85rem; }

.grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(12.5rem, 1fr));
  gap: 1rem;
}

.card {
  display: flex;
  flex-direction: column;
  position: relative;
  width: 100%;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: inherit;
  text-align: left;
  font: inherit;
  cursor: pointer;
  overflow: hidden;
}

.card:hover, .card.active { box-shadow: 0 0 0 2px var(--acc); }
.card.dragging { opacity: 0.45; }

.thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4 / 3;
  background: var(--thumb);
  overflow: hidden;
}

.thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--paper);
}

.thumb .pdf {
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
}

.card.folder { background: var(--side); }
.card.folder .thumb { background: var(--thumb); }

.folder-icon {
  position: relative;
  display: block;
  width: 3.1rem;
  height: 2.15rem;
  margin-top: 0.35rem;
  border-radius: 0 0.25rem 0.25rem 0.25rem;
  background: var(--acc);
}

.folder-icon::before {
  content: "";
  position: absolute;
  top: -0.38rem;
  left: 0;
  width: 1.25rem;
  height: 0.42rem;
  border-radius: 0.15rem 0.15rem 0 0;
  background: var(--acc);
}

.card .name-row, .card .name, .card .meta, .card .col {
  display: block;
  padding: 0 0.7rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card .name-row {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  padding-top: 0.55rem;
  min-width: 0;
}

.card .name {
  flex: 1;
  min-width: 0;
  padding: 0;
  font-weight: 600;
}

.card .meta { padding-bottom: 0.65rem; }
.card .col { display: none; }

.rename {
  flex: 0 0 auto;
  padding: 0.05rem 0.28rem;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
}

.card:hover .rename,
.card:focus-within .rename,
.tree-row:hover .rename,
.tree-row:focus-within .rename,
.rename:focus {
  opacity: 1;
}

.rename:hover { color: var(--ink); }

.rename-input {
  width: 100%;
  min-width: 0;
  margin: 0;
  padding: 0.1rem 0.25rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--card);
  color: var(--ink);
  font: inherit;
  font-weight: 600;
}

.badge {
  position: absolute;
  top: 0.4rem;
  right: 0.4rem;
  padding: 0.1rem 0.4rem;
  border-radius: 999px;
  background: var(--card);
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.03em;
}

.badge.ocr { color: var(--ink); }
.badge.short { color: var(--ink); }
.badge.pending { color: var(--ink); }

.grid.list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.grid.list .card {
  flex-direction: row;
  align-items: center;
  gap: 0.15rem;
  border-radius: 6px;
}

.grid.list .thumb {
  flex: 0 0 2.5rem;
  width: 2.5rem;
  height: 2.5rem;
  aspect-ratio: 1;
}

.grid.list .folder-icon {
  width: 1.35rem;
  height: 0.95rem;
  margin-top: 0.15rem;
}

.grid.list .folder-icon::before {
  top: -0.18rem;
  width: 0.55rem;
  height: 0.2rem;
}

.grid.list .name-row,
.grid.list .col {
  display: block;
  padding: 0.4rem 0.55rem;
}

.grid.list .name-row {
  display: flex;
  flex: 1.4;
  min-width: 8rem;
  padding-top: 0.4rem;
}
.grid.list .name { padding: 0; }
.grid.list .col.folder { flex: 1; min-width: 6rem; color: var(--muted); }
.grid.list .col.date { flex: 0 0 7rem; color: var(--muted); }
.grid.list .col.ocr { flex: 0 0 5rem; color: var(--muted); }
.grid.list .meta, .grid.list .badge { display: none; }

.meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.empty {
  grid-column: 1 / -1;
  padding: 1.5rem 0.2rem;
  color: var(--muted);
}

.viewer {
  position: fixed;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.viewer[hidden] { display: none; }

.viewer-bar {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--line);
  background: var(--card);
}

.viewer-bar .meta {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.viewer-panes {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 1fr minmax(16rem, 1fr);
}

.viewer-media,
.viewer-ocr {
  min-width: 0;
  min-height: 0;
  overflow: auto;
}

.viewer-media img,
.viewer-media iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--paper);
  object-fit: contain;
}

.viewer-ocr {
  border-left: 1px solid var(--line);
  background: var(--card);
}

.viewer-ocr pre {
  margin: 0;
  padding: 1rem 1.1rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: 0.88rem/1.45 ui-monospace, "SFMono-Regular", Menlo, monospace;
}

.viewer-ocr pre.empty {
  color: var(--muted);
  font-family: inherit;
}

#drop-hint {
  position: fixed;
  inset: 0.75rem;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--acc);
  border-radius: 12px;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  color: var(--ink);
  font-size: 1.1rem;
  pointer-events: none;
}

#drop-hint[hidden] { display: none; }

a.button, .auth-card button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: var(--ink);
  text-decoration: none;
  cursor: pointer;
}

body.auth {
  display: grid;
  place-items: center;
  min-height: 100%;
}

.auth-card {
  width: min(22rem, calc(100% - 2rem));
  display: grid;
  gap: 0.75rem;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
}

.auth-card label { display: grid; gap: 0.3rem; }
.auth-card input {
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
}

.error { color: #b42318; margin: 0; }

@media (max-width: 800px) {
  body { grid-template-columns: 1fr; }
  .sidebar { max-height: 40vh; border-right: 0; border-bottom: 1px solid var(--line); }
  .bar { flex-wrap: wrap; }
  .viewer-panes {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr;
  }
  .viewer-ocr { border-left: 0; border-top: 1px solid var(--line); }
}