:root {
  --color-bg: #f5f6fa;
  --color-surface: #ffffff;
  --color-border: #e4e7ef;
  --color-border-strong: #d3d8e3;
  --color-text: #10182b;
  --color-text-muted: #64748b;
  --color-primary: #0f2a5c;
  --color-primary-dark: #0a1d40;
  --color-primary-tint: rgba(15, 42, 92, .08);
  --color-accent: #c9a227;
  --color-danger: #b42318;
  --color-danger-border: #fecdca;
  --color-danger-bg: #fff5f5;
  --color-success: #166534;
  --color-success-border: #bbf7d0;
  --color-success-bg: #f0fdf4;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .05);
  --shadow-md: 0 12px 28px rgba(15, 23, 42, .10);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", system-ui, Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

h1, h2, h3 { margin-top: 0; font-weight: 750; letter-spacing: -.01em; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }

.muted { color: var(--color-text-muted); }

/* Topbar / nav */
.topbar {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 14px 24px;
  background: var(--color-surface);
  border-bottom: 3px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 800; font-size: 19px; margin-right: 12px; color: var(--color-primary); }

.nav-toggle { display: inline-flex; flex-direction: column; justify-content: center; align-items: center; gap: 5px; width: 42px; height: 42px; border: 1px solid var(--color-border-strong); border-radius: 10px; background: #fff; cursor: pointer; padding: 0; flex-shrink: 0; transition: background .15s ease, border-color .15s ease; }
.nav-toggle:hover { background: #f8fafc; border-color: var(--color-primary); }
.nav-toggle span { display: block; height: 2px; width: 20px; background: var(--color-text); border-radius: 2px; transition: transform .18s ease, opacity .18s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.topbar { position: relative; }
.topbar nav { display: none; flex-direction: column; align-items: stretch; gap: 2px; position: absolute; top: calc(100% + 6px); right: 24px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 14px; box-shadow: var(--shadow-md); padding: 10px; min-width: 250px; max-height: calc(100vh - 90px); overflow-y: auto; }
.topbar nav.open { display: flex; }
.topbar nav a, .topbar nav button { display: block; width: 100%; text-align: left; padding: 10px 12px; border-radius: 10px; border: none; background: none; font: inherit; font-weight: 650; color: var(--color-text); cursor: pointer; transition: background .12s ease; }
.topbar nav a:hover, .topbar nav button:hover { background: var(--color-primary-tint); }
.topbar nav .user { display: block; padding: 6px 12px 12px; margin-bottom: 4px; border-bottom: 1px solid var(--color-border); color: var(--color-text-muted); font-size: 13px; font-weight: 700; }

/* Breadcrumbs */
.breadcrumbs { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; font-size: 13px; color: var(--color-text-muted); margin-bottom: 16px; }
.breadcrumbs a { color: #475569; }
.breadcrumbs a:hover { text-decoration: underline; }
.breadcrumbs .sep { color: #cbd5e1; }
.breadcrumbs .current { color: var(--color-text); font-weight: 700; }

.container { max-width: 1180px; margin: 0 auto; padding: 28px 24px; }
.footer { text-align: center; color: var(--color-text-muted); padding: 28px; font-size: 13px; }

/* Cards */
.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 22px; box-shadow: var(--shadow-sm); margin-bottom: 18px; }
.narrow { max-width: 440px; margin: 56px auto; }

.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 20px; }
.toolbar.compact { margin-bottom: 12px; }

/* Forms */
.form label { display: block; font-weight: 650; color: #334155; margin-bottom: 16px; font-size: 14px; }
input, textarea, select {
  width: 100%; margin-top: 6px; border: 1px solid var(--color-border-strong); border-radius: 10px;
  padding: 11px 13px; font: inherit; background: #fff; color: var(--color-text);
  transition: border-color .15s ease, box-shadow .15s ease;
}
textarea { resize: vertical; }
input[type="checkbox"], input[type="radio"] { width: auto; margin-top: 0; }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-tint); }
input:disabled, textarea:disabled, select:disabled { background: #f8fafc; color: var(--color-text-muted); cursor: not-allowed; }

.grid { display: grid; gap: 16px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.no-card { margin: 0; }
.full { grid-column: 1 / -1; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--color-border-strong); border-radius: 999px; padding: 10px 16px;
  background: var(--color-surface); color: var(--color-text); cursor: pointer;
  font-weight: 650; font-size: 14px;
  transition: background .15s ease, border-color .15s ease, box-shadow .15s ease, transform .05s ease;
}
.btn:hover { background: #f1f4f9; border-color: #c7cede; }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); box-shadow: var(--shadow-sm); }
.btn.primary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); }
.btn.danger { color: var(--color-danger); border-color: var(--color-danger-border); background: var(--color-danger-bg); }
.btn.danger:hover { background: #fee2e2; }
.btn.small { padding: 7px 12px; font-size: 13px; }
.btn[disabled] { opacity: .45; cursor: not-allowed; }
.btn[disabled]:hover { background: var(--color-surface); border-color: var(--color-border-strong); }

.actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.actions .btn, .actions form { margin-bottom: 4px; }

/* Tables */
.table-wrap { overflow-x: auto; border-radius: var(--radius-md); }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--color-border); vertical-align: top; }
th { color: var(--color-text-muted); font-size: 11px; text-transform: uppercase; letter-spacing: .05em; font-weight: 700; background: #fafbfd; }
tbody tr:hover td { background: #fafbff; }
tbody tr:last-child td { border-bottom: none; }

/* Pills / badges */
.pill { display: inline-flex; align-items: center; border-radius: 999px; padding: 4px 10px; font-size: 12px; font-weight: 750; background: #eef1f6; color: #334155; }
.pill.sent { background: #dcfce7; color: #166534; }
.pill.draft { background: #fef9c3; color: #854d0e; }
.pill.archived { background: #ede9fe; color: #5b21b6; }

/* Alerts */
.alert { border-radius: var(--radius-md); padding: 12px 16px; margin-bottom: 16px; background: #eff6ff; border: 1px solid #bfdbfe; border-left: 4px solid #3b82f6; color: #1e3a8a; font-size: 14px; }
.alert.error { background: var(--color-danger-bg); border-color: var(--color-danger-border); border-left-color: #dc2626; color: #991b1b; }
.alert.success { background: var(--color-success-bg); border-color: var(--color-success-border); border-left-color: #16a34a; color: var(--color-success); }

.empty-state { text-align: center; color: var(--color-text-muted); padding: 28px 12px; font-size: 14px; }

.checklist { display: grid; gap: 2px; max-height: 260px; overflow-y: auto; border: 1px solid var(--color-border); border-radius: 10px; padding: 8px; }
.checklist-item { display: flex; align-items: center; gap: 8px; padding: 6px 8px; border-radius: 8px; font-weight: 500; cursor: pointer; font-size: 14px; }
.checklist-item:hover { background: var(--color-bg); }
.checklist-item:has(input:disabled) { opacity: .55; cursor: default; }

.agenda-list { display: grid; gap: 16px; }
.agenda-row { border: 1px solid var(--color-border); border-radius: 14px; padding: 16px; background: var(--color-bg); }
.protocol-item { border-top: 1px solid var(--color-border); padding-top: 14px; margin-top: 14px; }
.meta-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-bottom: 14px; }

/* Activity log */
.activity-log { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.activity-entry { border-left: 2px solid var(--color-border); padding-left: 14px; }
.activity-entry-head { display: flex; align-items: flex-start; gap: 10px; }
.activity-icon { font-size: 15px; line-height: 1.5; }
.activity-diff { margin: 6px 0 0 25px; font-size: 13px; }
.activity-diff summary { cursor: pointer; color: var(--color-text-muted); font-weight: 600; }
.activity-diff ul { margin: 8px 0 0; padding-left: 18px; display: grid; gap: 4px; color: #334155; }
.diff-old { color: #b42318; text-decoration: line-through; }
.diff-new { color: #166534; }

/* Collapsible admin sections (native <details>) styled like a card */
details.card { padding: 0; }
details.card > summary { list-style: none; cursor: pointer; padding: 20px 22px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
details.card > summary::-webkit-details-marker { display: none; }
details.card > summary::after { content: '▾'; color: var(--color-text-muted); transition: transform .15s ease; font-size: 13px; }
details.card[open] > summary::after { transform: rotate(180deg); }
details.card > summary:hover { background: #fafbff; border-radius: var(--radius-lg); }
details.card > .details-body { padding: 0 22px 22px; }

@media (max-width: 760px) {
  .toolbar { flex-direction: column; align-items: flex-start; }
  .grid.two, .meta-grid { grid-template-columns: 1fr; }
  .container { padding: 16px; }
  .topbar nav { left: 14px; right: 14px; min-width: 0; }
}