:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --fg: #0f172a;
  --fg-secondary: #475569;
  --fg-muted: #64748b;
  --fg-faint: #94a3b8;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #eff6ff;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --danger-soft: #fef2f2;
  --ok-soft: #ecfdf5;
  --ok-fg: #047857;
  --err-soft: #fef2f2;
  --err-fg: #b91c1c;
  --radius: 6px;
  --radius-lg: 8px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

.shell {
  max-width: 880px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

header.page {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 20px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

header.page h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

header.page .meta {
  font-size: 12px;
  color: var(--fg-muted);
  font-family: var(--mono);
  letter-spacing: 0;
}

section.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 24px;
}

section.card > h2 {
  margin: 0 0 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: -0.005em;
}

section.card > p.hint {
  margin: 0 0 16px;
  font-size: 12px;
  color: var(--fg-muted);
}

.alert {
  padding: 10px 12px;
  border-radius: var(--radius);
  font-size: 13px;
  margin-bottom: 16px;
  border: 1px solid transparent;
}
.alert-error { background: var(--err-soft); color: var(--err-fg); border-color: #fecaca; }
.alert-ok    { background: var(--ok-soft);  color: var(--ok-fg);  border-color: #a7f3d0; }

form.inline-form {
  display: grid;
  grid-template-columns: 160px 1fr auto;
  gap: 8px;
  align-items: end;
}

form.stack-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 520px;
}

label.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  color: var(--fg-secondary);
  font-weight: 500;
}

label.field .hint {
  font-weight: 400;
  color: var(--fg-faint);
  font-size: 11px;
}

input[type="text"], input[type="url"] {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--fg);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 8px 10px;
  width: 100%;
  outline: none;
  transition: border-color 150ms cubic-bezier(0.25, 1, 0.5, 1),
              box-shadow 150ms cubic-bezier(0.25, 1, 0.5, 1);
}
input[type="text"]:focus, input[type="url"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

input.code, code {
  font-family: var(--mono);
  font-size: 12.5px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--fg);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 150ms cubic-bezier(0.25, 1, 0.5, 1),
              border-color 150ms cubic-bezier(0.25, 1, 0.5, 1);
}
.btn:hover { background: var(--bg); text-decoration: none; color: var(--fg); }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }

.btn-danger {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--danger);
}
.btn-danger:hover { background: var(--danger-soft); border-color: #fecaca; color: var(--danger-hover); }

.btn-sm { padding: 4px 10px; font-size: 12px; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

table th {
  text-align: left;
  font-size: 11px;
  font-weight: 500;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--fg-secondary);
  vertical-align: middle;
}

table tr:last-child td { border-bottom: none; }

table td code {
  color: var(--fg);
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
}

table td a.url {
  color: var(--fg-secondary);
  font-family: var(--mono);
  font-size: 12px;
  word-break: break-all;
}
table td a.url:hover { color: var(--accent); }

table td.actions {
  text-align: right;
  white-space: nowrap;
  display: flex;
  gap: 6px;
  justify-content: flex-end;
  align-items: center;
}
table td.actions form { margin: 0; }

table tr.empty td {
  text-align: center;
  color: var(--fg-faint);
  padding: 32px 12px;
  font-size: 12px;
  font-style: italic;
}

.path-display {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg);
  background: var(--bg);
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.edit-actions {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

footer.page {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--fg-faint);
  display: flex;
  justify-content: space-between;
}
footer.page code { color: var(--fg-muted); }

.link-btn {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  font: inherit;
  color: inherit;
  cursor: pointer;
  text-decoration: underline;
  display: inline;
}
.link-btn:hover { color: var(--accent); }

details {
  margin-top: 4px;
}
details > summary {
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--fg);
  padding: 4px 0;
  list-style: none;
  user-select: none;
}
details > summary::-webkit-details-marker { display: none; }
details > summary::before {
  content: "\25B8";
  display: inline-block;
  margin-right: 8px;
  color: var(--fg-muted);
  transition: transform 150ms cubic-bezier(0.25, 1, 0.5, 1);
}
details[open] > summary::before {
  transform: rotate(90deg);
}
details[open] > summary {
  margin-bottom: 12px;
}

.share-link-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
  margin: 8px 0;
}
.share-link {
  flex: 1;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-secondary);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 10px;
  word-break: break-all;
  user-select: all;
}
.share-warning {
  color: var(--fg-faint);
  font-style: italic;
  margin-top: 8px;
}