:root {
  --brainrock-navy: #002868;
  --brainrock-blue-accent: #0040a0;
  --brainrock-charcoal: #182030;
  --brainrock-gray-light: #e0e0e8;
  --brainrock-gray-mid: #c8c8d0;
  --brainrock-gray-dark: #909090;
  --brainrock-green: #1f8a4c;
  --brainrock-red: #c0392b;
  --surface: #ffffff;
  --page-bg: #f4f5f9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--brainrock-charcoal);
  background: var(--page-bg);
}

[x-cloak] { display: none !important; }

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

/* Topbar */

.topbar {
  background: var(--brainrock-navy);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
}

.topbar__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: #fff;
  font-size: 1.15rem;
  font-weight: 600;
}
.topbar__brand:hover { color: var(--brainrock-gray-light); text-decoration: none; }

.topbar__icon {
  width: 28px;
  height: 28px;
  filter: brightness(0) invert(1);
}

.topbar__tag {
  font-size: 0.8rem;
  color: var(--brainrock-gray-light);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
}

.page {
  max-width: 1240px;
  margin: 0 auto;
  padding: 1.75rem 1.5rem 3rem;
}

.muted { color: var(--brainrock-gray-dark); }

.empty-state {
  color: var(--brainrock-gray-dark);
  padding: 1.5rem 0;
  text-align: center;
}

/* Document list */

.list-page__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.list-page__header h1 {
  margin: 0 0 0.15rem;
  font-size: 1.6rem;
  color: var(--brainrock-navy);
}

.search-input {
  min-width: 260px;
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--brainrock-gray-mid);
  border-radius: 8px;
  font-size: 0.95rem;
  background: var(--surface);
}
.search-input:focus {
  outline: none;
  border-color: var(--brainrock-blue-accent);
  box-shadow: 0 0 0 3px rgba(0, 64, 160, 0.15);
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 1.1rem;
}

.doc-card {
  background: var(--surface);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(16, 24, 48, 0.08);
  border: 1px solid var(--brainrock-gray-light);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  color: var(--brainrock-charcoal);
}
.doc-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(16, 24, 48, 0.14);
  text-decoration: none;
  color: var(--brainrock-charcoal);
}

.doc-card__thumb {
  background: var(--brainrock-gray-light);
  aspect-ratio: 3 / 4;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.doc-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.doc-card__body { padding: 0.7rem 0.85rem 0.9rem; }

.doc-card__label {
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.doc-card__meta {
  font-size: 0.78rem;
  color: var(--brainrock-gray-dark);
  margin-top: 0.2rem;
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}
.pagination__status { color: var(--brainrock-gray-dark); font-size: 0.9rem; }

.btn {
  font: inherit;
  cursor: pointer;
  border-radius: 8px;
  padding: 0.5rem 1rem;
  border: 1px solid transparent;
}
.btn--ghost {
  background: var(--surface);
  border-color: var(--brainrock-gray-mid);
  color: var(--brainrock-charcoal);
}
.btn--ghost:hover { border-color: var(--brainrock-blue-accent); color: var(--brainrock-blue-accent); }

/* Document detail */

.back-link { font-size: 0.9rem; }

.detail-page__header { margin-bottom: 1.25rem; }
.detail-page__header h1 {
  margin: 0.3rem 0 0.6rem;
  color: var(--brainrock-navy);
  font-size: 1.5rem;
}

.chip-row { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.chip {
  display: inline-block;
  font-size: 0.78rem;
  background: var(--brainrock-gray-light);
  color: var(--brainrock-charcoal);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
}
.chip--cabinet { background: #dfe9f7; color: var(--brainrock-navy); }

.split-view {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(320px, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.split-view__preview {
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--brainrock-gray-light);
  box-shadow: 0 1px 3px rgba(16, 24, 48, 0.08);
  overflow: hidden;
  height: calc(100vh - 220px);
  min-height: 480px;
}
.preview-frame { width: 100%; height: 100%; border: 0; display: block; }

.split-view__side {
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--brainrock-gray-light);
  box-shadow: 0 1px 3px rgba(16, 24, 48, 0.08);
  overflow: hidden;
}

.tabs {
  display: flex;
  border-bottom: 1px solid var(--brainrock-gray-light);
}
.tab-btn {
  flex: 1;
  font: inherit;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0.85rem 1rem;
  color: var(--brainrock-gray-dark);
  border-bottom: 2px solid transparent;
}
.tab-btn:hover { color: var(--brainrock-navy); }
.tab-btn--active {
  color: var(--brainrock-navy);
  font-weight: 600;
  border-bottom-color: var(--brainrock-blue-accent);
}

.tab-panel { padding: 1rem 1.1rem 1.4rem; max-height: calc(100vh - 300px); overflow-y: auto; }

/* Metadata fields */

.metadata-panel { display: flex; flex-direction: column; gap: 0.9rem; }

.field-row { position: relative; }
.field-row__label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--brainrock-gray-dark);
  margin-bottom: 0.25rem;
}
.field-row__control {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.field-row__input {
  flex: 1;
  min-width: 0;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--brainrock-gray-mid);
  border-radius: 6px;
  font: inherit;
  background: var(--surface);
}
.field-row__input:focus {
  outline: none;
  border-color: var(--brainrock-blue-accent);
  box-shadow: 0 0 0 3px rgba(0, 64, 160, 0.15);
}
.field-row__save-btn {
  flex-shrink: 0;
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
  white-space: nowrap;
  padding: 0.45rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--brainrock-blue-accent);
  background: var(--brainrock-blue-accent);
  color: #fff;
}
.field-row__save-btn:hover { background: var(--brainrock-navy); border-color: var(--brainrock-navy); }
.field-row__saved {
  position: absolute;
  top: 0;
  right: 0;
  font-size: 0.72rem;
  color: var(--brainrock-green);
  font-weight: 600;
}

/* History */

.history-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.9rem; }
.history-entry {
  border-left: 3px solid var(--brainrock-blue-accent);
  padding-left: 0.75rem;
}
.history-entry__field { font-weight: 600; font-size: 0.88rem; }
.history-entry__diff { font-size: 0.9rem; margin-top: 0.15rem; }
.diff-old { color: var(--brainrock-red); text-decoration: line-through; margin-right: 0.35rem; }
.diff-arrow { color: var(--brainrock-gray-dark); margin-right: 0.35rem; }
.diff-new { color: var(--brainrock-green); font-weight: 600; }
.history-entry__meta { font-size: 0.76rem; color: var(--brainrock-gray-dark); margin-top: 0.2rem; }

@media (max-width: 900px) {
  .split-view { grid-template-columns: 1fr; }
  .split-view__preview { height: 60vh; }
}