:root {
  --provider-bg: #f7f7f8;
  --provider-surface: #ffffff;
  --provider-text: #1f2430;
  --provider-muted: #6b7280;
  --provider-primary: #4f46e5;
  --provider-primary-light: #eef2ff;
  --provider-border: #e5e7eb;
  --provider-radius: 0.75rem;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--provider-text);
  background: var(--provider-bg);
  line-height: 1.55;
}

.site-header {
  background: var(--provider-surface);
  border-bottom: 1px solid var(--provider-border);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--provider-text);
  font-weight: 600;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  background: var(--provider-primary);
  color: #fff;
  font-weight: 800;
}

.brand-text { font-size: 1rem; }
.brand-text strong { color: var(--provider-primary); }

.site-nav { display: flex; gap: 0.25rem; flex-wrap: wrap; }

.nav-link {
  padding: 0.4rem 0.75rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-size: 0.875rem;
  color: var(--provider-muted);
}

.nav-link-active,
.nav-link:hover { color: var(--provider-primary); background: var(--provider-primary-light); }

.site-main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
  min-height: 60vh;
}

.site-footer {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.25rem;
  color: var(--provider-muted);
  font-size: 0.8125rem;
  border-top: 1px solid var(--provider-border);
}

.page-title { font-size: 1.75rem; font-weight: 800; letter-spacing: -0.02em; margin: 0 0 0.5rem; }

.provider-line { color: var(--provider-muted); font-size: 0.9375rem; margin: 0 0 1.5rem; }

.provider-type {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  background: var(--provider-primary-light);
  color: var(--provider-primary);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: capitalize;
}

.empty-state {
  background: var(--provider-surface);
  border: 1px solid var(--provider-border);
  border-radius: var(--provider-radius);
  padding: 2rem;
  text-align: center;
}

.empty-state h2 { margin: 0 0 0.5rem; font-size: 1.125rem; }
.empty-state p { margin: 0; color: var(--provider-muted); }

.empty-state-error { border-color: #fecaca; background: #fef2f2; }
.empty-state-error h2 { color: #991b1b; }

/* ── P3A: participants + invitations ─────────────────────────────────────── */
.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.page-head .page-title { margin: 0; }
.page-sub { color: var(--provider-muted); font-size: 0.9375rem; margin: 0 0 1.5rem; }

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid transparent;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  line-height: 1.4;
}
.btn-primary { background: var(--provider-primary); color: #fff; }
.btn-primary:hover { filter: brightness(1.06); }
.btn-secondary { background: var(--provider-primary-light); color: var(--provider-primary); }
.btn-danger { background: #fef2f2; color: #b91c1c; border-color: #fecaca; }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.8125rem; }

.flash {
  background: var(--provider-primary-light);
  color: var(--provider-primary);
  border: 1px solid #c7d2fe;
  border-radius: var(--provider-radius);
  padding: 0.75rem 1rem;
  margin-bottom: 1.25rem;
  font-size: 0.9375rem;
}

.section {
  background: var(--provider-surface);
  border: 1px solid var(--provider-border);
  border-radius: var(--provider-radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
}
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}
.section-head h2 { margin: 0; font-size: 1.0625rem; }
.section-head .count { color: var(--provider-muted); font-size: 0.8125rem; }

.roster-list { display: flex; flex-direction: column; }
.roster-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--provider-border);
  flex-wrap: wrap;
}
.roster-item:last-child { border-bottom: 0; }
.roster-item .name { font-weight: 600; }
.roster-item .email { color: var(--provider-muted); font-size: 0.875rem; }

.badge {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  white-space: nowrap;
}
.badge-pending { background: #fef3c7; color: #92400e; }
.badge-active { background: #dcfce7; color: #166534; }
.badge-revoked { background: #f3f4f6; color: #6b7280; }
.badge-expired { background: #f3f4f6; color: #6b7280; }
.badge-accepted { background: #dcfce7; color: #166534; }

.meta { color: var(--provider-muted); font-size: 0.8125rem; }
.meta .sep { margin: 0 0.35rem; }

.form-group { margin-bottom: 1rem; }
.form-label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 0.3rem; }
.form-input {
  width: 100%;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--provider-border);
  border-radius: 0.5rem;
  font-size: 0.9375rem;
  color: var(--provider-text);
  background: #fff;
}
.form-input:focus { outline: 2px solid var(--provider-primary); border-color: transparent; }
.form-error { color: #b91c1c; font-size: 0.875rem; margin-bottom: 1rem; }
.form-actions { display: flex; gap: 0.75rem; align-items: center; }
.inline-form { display: inline; }