:root {
  --bg: #0d121a;
  --bg-elevated: #131a25;
  --surface: #171f2c;
  --surface-soft: #1d2736;
  --surface-strong: #243246;
  --border: rgba(212, 222, 240, 0.12);
  --border-strong: rgba(155, 187, 255, 0.34);
  --text: #f5f7fb;
  --muted: #a4afc2;
  --muted-strong: #d6dde9;
  --accent: #90b4ff;
  --accent-strong: #b0c7ff;
  --accent-soft: rgba(144, 180, 255, 0.14);
  --success: #7fd0ae;
  --warn: #f1c878;
  --danger: #ef8ea0;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.26);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  font-family: "Instrument Sans", "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background:
    radial-gradient(circle at top, rgba(144, 180, 255, 0.1), transparent 32%),
    linear-gradient(180deg, #0d121a 0%, #111823 100%);
  color: var(--text);
}
button, input, textarea, select {
  font: inherit;
}
button, .button-link {
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--accent);
  color: #0a1020;
  font-weight: 700;
  padding: 0.82rem 1.15rem;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, color 180ms ease, box-shadow 180ms ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
button:hover, .button-link:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.16);
}
button.secondary, button.ghost, .button-link.ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
button.danger {
  background: var(--danger);
  color: white;
}
button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, .button-link:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
}
button:disabled {
  opacity: 0.65;
  cursor: wait;
  transform: none;
  box-shadow: none;
}
a { color: inherit; }
input, textarea, select {
  width: 100%;
  min-height: 48px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 0.95rem 1rem;
}
input::placeholder, textarea::placeholder { color: #74829d; }
textarea {
  min-height: 220px;
  resize: vertical;
  line-height: 1.55;
}
select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted-strong) 50%),
    linear-gradient(135deg, var(--muted-strong) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) calc(50% - 2px),
    calc(100% - 12px) calc(50% - 2px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}
.hidden { display: none !important; }
.stack { display: flex; flex-direction: column; }
.gap-xs { gap: var(--space-2); }
.gap-md { gap: var(--space-4); }
.eyebrow {
  display: inline-block;
  margin-bottom: var(--space-2);
  color: var(--accent-strong);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.muted { color: var(--muted); }
.helper-text { margin: 0; color: var(--muted); font-size: 0.92rem; line-height: 1.5; }
.error { min-height: 1.5rem; color: #ffc0ca; }
.field-label {
  font-size: 0.88rem;
  color: var(--muted-strong);
  font-weight: 600;
}

#app {
  width: min(1520px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0 40px;
}
.center-card {
  min-height: calc(100vh - 64px);
  display: grid;
  place-items: center;
}
.auth-shell {
  width: min(1140px, 100%);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.85fr);
  gap: var(--space-8);
  align-items: stretch;
}
.auth-copy, .card, .surface {
  border: 1px solid var(--border);
  background: rgba(19, 26, 37, 0.84);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}
.auth-copy {
  border-radius: var(--radius-xl);
  padding: var(--space-10);
}
.auth-copy h1, .topbar h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
}
.auth-copy .lede {
  max-width: 46ch;
  font-size: 1.08rem;
  line-height: 1.6;
  color: var(--muted-strong);
}
.auth-points {
  margin: var(--space-6) 0 0;
  padding-left: 18px;
  color: var(--muted);
  display: grid;
  gap: var(--space-3);
  line-height: 1.6;
}
.card {
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}
.auth-card h2 { margin-top: 0; margin-bottom: var(--space-2); }

.surface {
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}
.surface--topbar {
  padding: var(--space-6);
  margin-bottom: var(--space-4);
}
.topbar {
  display: flex;
  justify-content: space-between;
  gap: var(--space-6);
  align-items: flex-start;
}
.topbar-main {
  display: grid;
  gap: var(--space-5);
  min-width: 0;
  flex: 1;
}
.topbar-side {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.search-shell {
  width: min(760px, 100%);
  display: grid;
  gap: var(--space-2);
}
.search-label { font-size: 0.88rem; color: var(--muted-strong); }
.search-hint { margin: 0; font-size: 0.88rem; line-height: 1.5; }
.status-chip, .status-pill {
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  padding: 0.7rem 1rem;
  color: var(--muted);
  display: inline-flex;
  gap: var(--space-2);
  align-items: center;
}
.status-pill[data-tone="success"] { color: var(--success); border-color: rgba(127, 208, 174, 0.35); }
.status-pill[data-tone="warn"] { color: var(--warn); border-color: rgba(241, 200, 120, 0.35); }
.status-pill[data-tone="danger"] { color: var(--danger); border-color: rgba(239, 142, 160, 0.35); }
.status-chip strong { color: var(--text); }

.tabs {
  display: inline-flex;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  margin-bottom: var(--space-5);
}
.tab-button {
  background: transparent;
  color: var(--muted-strong);
  border-color: transparent;
}
.tab-button.active {
  background: var(--accent-soft);
  color: var(--text);
  border-color: var(--border-strong);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }
.workspace-grid {
  display: grid;
  grid-template-columns: minmax(380px, 460px) minmax(0, 1fr);
  gap: var(--space-5);
  align-items: start;
}
.workspace-grid--files { grid-template-columns: 1fr; }
.list-pane, .detail-pane { min-width: 0; }
.detail-pane--wide { min-height: 540px; }
.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.section-heading h2, .section-heading h3 { margin: 0 0 6px; }
.section-heading p { margin: 0; line-height: 1.5; }
.section-heading--detail {
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--border);
}
.list-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.list-summary--wide {
  margin-top: var(--space-2);
}
.list-summary > div {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(255, 255, 255, 0.03);
  display: grid;
  gap: var(--space-1);
}
.list-summary strong {
  font-size: 1.1rem;
  color: var(--text);
}
.list-summary span {
  font-size: 0.86rem;
  color: var(--muted);
}
.inline-actions {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  flex-wrap: wrap;
}
.split-actions { justify-content: space-between; }
.item-list {
  display: grid;
  gap: 10px;
}
.item-card {
  width: 100%;
  text-align: left;
  padding: 0;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.025);
  color: var(--text);
  transition: border-color 180ms ease, background 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.item-card:hover {
  border-color: rgba(155, 187, 255, 0.24);
  background: rgba(255, 255, 255, 0.04);
  transform: translateY(-1px);
}
.item-card.active {
  border-color: var(--border-strong);
  background: linear-gradient(180deg, rgba(144, 180, 255, 0.11), rgba(144, 180, 255, 0.06));
  box-shadow: inset 0 0 0 1px rgba(176, 199, 255, 0.12), 0 10px 24px rgba(0, 0, 0, 0.14);
}
.item-card--list {
  display: grid;
  gap: 8px 14px;
  padding: 14px 16px 13px;
  align-items: start;
}
.item-card--index {
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "title meta"
    "kind meta";
  min-height: 84px;
}
.item-card__headline {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}
.item-card__headline--index {
  align-items: center;
}
.item-card__meta-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}
.item-card__meta-row--index {
  gap: 10px;
}
.item-card__title-row {
  grid-area: title;
  min-width: 0;
  align-self: start;
}
.item-card__footer {
  display: contents;
}
.item-card__footer--index {
  margin-top: 0;
}
.item-card__kind {
  grid-area: kind;
  align-self: end;
  justify-self: start;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(214, 221, 233, 0.44);
}
.item-card__meta-cluster {
  grid-area: meta;
  min-width: 0;
  max-width: min(100%, 16rem);
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-content: space-between;
  justify-self: end;
  align-self: stretch;
  gap: 6px 10px;
  margin-left: auto;
  padding-left: 8px;
  text-align: right;
}
.item-card__meta-cluster--end {
  justify-self: end;
}
.item-card__meta-cluster > .item-meta {
  flex: 0 0 auto;
}
.item-card__meta-cluster > .item-meta--timestamp:last-child:not(:first-child) {
  flex-basis: 100%;
  display: inline-flex;
  justify-content: flex-end;
  margin-left: auto;
  margin-top: 2px;
}
.item-card__meta-cluster > .item-meta--timestamp:only-child {
  justify-content: flex-end;
  margin-left: auto;
}
.item-title {
  display: block;
  line-height: 1.24;
  word-break: break-word;
}
.item-title--list {
  font-size: 0.99rem;
  font-weight: 740;
  letter-spacing: -0.018em;
  color: var(--text);
  overflow-wrap: anywhere;
}
.item-excerpt {
  margin: 0;
  color: var(--muted-strong);
  line-height: 1.55;
}
.item-excerpt--compact {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.item-excerpt--mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88rem;
}
.item-meta {
  min-width: 0;
  font-size: 0.76rem;
  color: rgba(164, 175, 194, 0.78);
}
.item-meta--single {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.item-meta--timestamp {
  justify-self: end;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.item-badge {
  flex-shrink: 0;
  max-width: 148px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 999px;
  border: 1px solid rgba(155, 187, 255, 0.24);
  padding: 0.28rem 0.56rem;
  color: var(--accent-strong);
  background: rgba(144, 180, 255, 0.1);
}
.item-badge--neutral {
  color: var(--muted-strong);
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.035);
}
.empty-state, .inline-state {
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-strong);
  background: rgba(144, 180, 255, 0.06);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
}
.empty-state.compact { margin-top: var(--space-3); }
.empty-state h3 { margin: 0 0 var(--space-2); }
.preview-panel {
  margin-top: var(--space-2);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.03);
}
.preview-header {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border);
}
.preview-body {
  padding: var(--space-5);
  max-height: 420px;
  overflow: auto;
}
.prose :first-child { margin-top: 0; }
.prose :last-child { margin-bottom: 0; }
.code-block { margin: 0; white-space: pre-wrap; }
.editor-form {
  margin-top: var(--space-5);
}
.editor-meta-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(200px, 240px);
  gap: var(--space-4);
  align-items: end;
}
.editor-meta-grid__custom {
  grid-column: 1 / -1;
}
.dropzone {
  display: grid;
  gap: var(--space-2);
  justify-items: center;
  text-align: center;
  padding: 34px 24px;
  border-radius: var(--radius-lg);
  border: 1.5px dashed var(--border-strong);
  background: rgba(144, 180, 255, 0.08);
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}
.dropzone:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.16);
}
.dropzone--pending {
  border-color: rgba(241, 200, 120, 0.8);
  background: rgba(241, 200, 120, 0.12);
  box-shadow: 0 0 0 1px rgba(241, 200, 120, 0.28), 0 18px 40px rgba(0, 0, 0, 0.18);
}
.dropzone input { display: none; }
.dropzone-title { font-weight: 700; font-size: 1.05rem; }
.selection-strip {
  margin: var(--space-2) 0 var(--space-5);
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(241, 200, 120, 0.45);
  color: var(--muted-strong);
  background: rgba(241, 200, 120, 0.1);
}
.selection-strip__header {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  align-items: center;
  margin-bottom: var(--space-3);
}
.selection-strip__names {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.selection-pill {
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  padding: 0.42rem 0.72rem;
  border-radius: 999px;
  border: 1px solid rgba(241, 200, 120, 0.34);
  background: rgba(13, 18, 26, 0.3);
  color: var(--text);
  word-break: break-word;
}
.item-badge--pending {
  color: #ffe4a1;
  border-color: rgba(241, 200, 120, 0.48);
  background: rgba(241, 200, 120, 0.12);
}
.file-table {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-3);
}
.file-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}
.file-row__main {
  min-width: 0;
  display: grid;
  gap: var(--space-3);
}
.file-row__headline {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-3);
  align-items: start;
}
.file-row__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.file-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  align-items: center;
}
.search-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}
.search-group {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: var(--space-4);
  background: rgba(255, 255, 255, 0.03);
}
.search-group__header {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  align-items: center;
  margin-bottom: var(--space-3);
}
.search-group__list {
  display: grid;
  gap: var(--space-3);
}
.search-result {
  width: 100%;
  text-align: left;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  color: var(--text);
  padding: var(--space-4);
  display: grid;
  gap: var(--space-2);
}

@media (max-width: 1280px) {
  .workspace-grid {
    grid-template-columns: minmax(340px, 420px) minmax(0, 1fr);
  }
}

@media (max-width: 1120px) {
  .auth-shell,
  .workspace-grid,
  .search-grid,
  .editor-meta-grid {
    grid-template-columns: 1fr;
  }
  .topbar { flex-direction: column; }
  .topbar-side { justify-content: flex-start; }
}

@media (max-width: 720px) {
  #app { width: min(100% - 20px, 1520px); padding-top: 10px; }
  .card, .surface, .auth-copy { padding: var(--space-5); }
  .tabs { display: flex; width: 100%; }
  .tab-button { flex: 1; }
  .section-heading,
  .split-actions,
  .file-row,
  .item-card__headline,
  .file-row__headline,
  .preview-header,
  .selection-strip__header {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }
  .list-summary {
    grid-template-columns: 1fr;
  }
  .topbar-side, .inline-actions { width: 100%; }
  .topbar-side > * { width: 100%; }
  .file-actions,
  .file-row__meta,
  .item-card__meta-row { width: 100%; }
  button, .button-link { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}