:root {
  --fg: #1a1a1a;
  --fg-secondary: #5a5f66;
  --bg: #fafafa;
  --bg-elev: #ffffff;
  --border: #e1e4e8;
  --accent: #0966c2;
  --accent-bg: #e7f0fb;
  --open: #06834f;
  --open-bg: #dff5ea;
  --closed: #9c6b3a;
  --closed-bg: #f5ebdc;
  --error: #b3261e;
  --error-bg: #fce4e2;
  --row-hover: #f1f4f8;
  --row-closed: #f7f5f1;
  --mono: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--fg);
  background: var(--bg);
}
.mono { font-family: var(--mono); font-size: 0.92em; }

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

/* ----- topbar ----- */
.topbar {
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.topbar-inner {
  max-width: 1400px; margin: 0 auto; padding: 12px 20px;
  display: flex; align-items: center; gap: 24px;
}
.brand {
  font-weight: 600; font-size: 16px; color: var(--fg);
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
.navlinks { display: flex; gap: 18px; flex-grow: 1; }
.navlinks a {
  color: var(--fg-secondary); font-weight: 500;
  padding: 4px 0; border-bottom: 2px solid transparent;
}
.navlinks a.active { color: var(--fg); border-bottom-color: var(--accent); }
.logout {
  display: flex; align-items: center; gap: 12px; margin: 0;
}
.user-email { color: var(--fg-secondary); font-size: 13px; }
.logout button {
  background: none; border: 1px solid var(--border);
  padding: 5px 12px; border-radius: 6px; cursor: pointer;
  color: var(--fg-secondary); font-size: 13px;
}
.logout button:hover { background: var(--row-hover); }

/* ----- layout ----- */
.main { max-width: 1400px; margin: 0 auto; padding: 24px 20px 40px; }
.footer {
  border-top: 1px solid var(--border); margin-top: 40px;
  padding: 16px 20px; max-width: 1400px; margin-left: auto; margin-right: auto;
  color: var(--fg-secondary); font-size: 12px;
}

/* ----- login ----- */
.login-body {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; background: var(--bg); padding: 20px;
}
.login-card {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: 10px; padding: 36px; width: 100%; max-width: 380px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.login-title { margin: 0 0 4px; font-size: 24px; font-weight: 600; }
.login-subtitle { margin: 0 0 24px; color: var(--fg-secondary); }
.login-error {
  background: var(--error-bg); color: var(--error);
  padding: 10px 12px; border-radius: 6px;
  font-size: 13px; margin-bottom: 16px;
}
.login-form { display: flex; flex-direction: column; gap: 14px; }
.login-form label { display: flex; flex-direction: column; gap: 4px; }
.login-form label span { font-size: 13px; color: var(--fg-secondary); }
.login-form input {
  padding: 9px 12px; border: 1px solid var(--border); border-radius: 6px;
  font-size: 14px; background: var(--bg-elev);
}
.login-form input:focus { outline: 2px solid var(--accent); border-color: transparent; }
.login-form button {
  background: var(--accent); color: white; border: none; padding: 10px;
  border-radius: 6px; cursor: pointer; font-size: 14px; font-weight: 500;
  margin-top: 6px;
}
.login-form button:hover { background: #074fa1; }
.login-note { font-size: 12px; color: var(--fg-secondary); margin-top: 20px; }

/* ----- records table ----- */
.records-controls {
  display: flex; gap: 10px; flex-wrap: wrap; align-items: center;
  margin-bottom: 16px;
}
.records-controls .search { flex-grow: 1; min-width: 240px; }
.records-controls input,
.records-controls select {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg-elev); font-size: 13px; color: var(--fg);
}
.records-controls .export {
  margin-left: auto; padding: 7px 12px; border: 1px solid var(--border);
  border-radius: 6px; background: var(--bg-elev); color: var(--fg);
  font-size: 13px;
}
.records-controls .export:hover { background: var(--row-hover); text-decoration: none; }

.records-table-wrap {
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-elev); overflow: hidden;
}
.records-table {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
.records-table th, .records-table td {
  padding: 8px 12px; text-align: left;
  border-bottom: 1px solid var(--border);
}
.records-table th {
  background: var(--bg); color: var(--fg-secondary);
  font-weight: 600; font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.04em;
}
.records-table tbody tr { cursor: pointer; }
.records-table tbody tr:hover { background: var(--row-hover); }
.records-table tbody tr.row-closed { background: var(--row-closed); }
.records-table tbody tr.row-closed:hover { background: var(--row-hover); }
.records-table tbody tr.row-closed td:not(.mono) { color: var(--fg-secondary); }
.records-table tr.pagination-row { background: var(--bg); cursor: default; }
.records-table tr.pagination-row:hover { background: var(--bg); }
.records-table tr.pagination-row td { border-bottom: none; padding: 12px; }

.empty { color: var(--fg-secondary); text-align: center; padding: 40px; }

.state {
  display: inline-block; padding: 2px 8px; border-radius: 10px;
  font-size: 11px; font-weight: 500; text-transform: uppercase;
  letter-spacing: 0.03em;
}
.state-open { background: var(--open-bg); color: var(--open); }
.state-closed { background: var(--closed-bg); color: var(--closed); }

.pagination {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
}
.page-info { color: var(--fg-secondary); font-size: 13px; }
.page-controls { display: flex; gap: 8px; }
.page-controls button {
  padding: 6px 12px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg-elev); cursor: pointer; font-size: 13px; color: var(--fg);
}
.page-controls button:hover { background: var(--row-hover); }

/* ----- detail ----- */
.detail-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 24px; flex-wrap: wrap; gap: 16px;
}
.detail-header .back {
  display: inline-block; color: var(--fg-secondary); font-size: 13px;
  margin-bottom: 8px;
}
.detail-header h1 {
  margin: 0; font-size: 26px; font-weight: 600; letter-spacing: -0.01em;
}
.detail-header .meta { margin: 8px 0 0; color: var(--fg-secondary); }
.detail-actions { display: flex; gap: 8px; }

.button {
  display: inline-block; padding: 7px 14px;
  background: var(--bg-elev); border: 1px solid var(--border);
  color: var(--fg); border-radius: 6px; font-size: 13px;
}
.button:hover { background: var(--row-hover); text-decoration: none; }

.detail-body {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px;
}
@media (max-width: 900px) { .detail-body { grid-template-columns: 1fr; } }

.detail-sections {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.detail-section {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: 8px; padding: 14px 16px;
}
.detail-section h2 {
  margin: 0 0 10px; font-size: 12px; font-weight: 600;
  color: var(--fg-secondary); text-transform: uppercase; letter-spacing: 0.06em;
}
.detail-section dl { margin: 0; }
.detail-section dt {
  font-size: 11px; color: var(--fg-secondary); margin-top: 8px;
  font-family: var(--mono);
}
.detail-section dt:first-child { margin-top: 0; }
.detail-section dd { margin: 2px 0 0; font-size: 13px; }

.history-panel {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: 8px; padding: 14px 16px; max-height: 80vh; overflow-y: auto;
}
.history-panel h2 {
  margin: 0 0 12px; font-size: 14px; font-weight: 600;
  position: sticky; top: 0; background: var(--bg-elev); padding-bottom: 6px;
}
.history-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.history-table th, .history-table td {
  padding: 6px 8px; text-align: left; border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.history-table th {
  font-weight: 600; color: var(--fg-secondary); font-size: 10px;
  text-transform: uppercase; letter-spacing: 0.05em;
}
.history-table td.old { color: var(--fg-secondary); }
.history-table td.new { color: var(--fg); font-weight: 500; }
.history-table tr.change-added td { background: var(--open-bg); }
.history-table tr.change-removed td { background: var(--error-bg); }

/* ----- downloads ----- */
.downloads-page { max-width: 720px; }
.downloads-page h1 { margin: 0 0 8px; }
.downloads-page p { color: var(--fg-secondary); }
.download-list { list-style: none; padding: 0; margin: 24px 0; }
.download-list li {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: 8px; padding: 16px 18px; margin-bottom: 12px;
  display: flex; align-items: center; gap: 16px; justify-content: space-between;
}
.download-list strong { display: block; margin-bottom: 4px; }
.download-list p { margin: 0; font-size: 13px; }