:root {
  --navy-900: #0b1c2c;
  --navy-800: #12293e;
  --teal-600: #0e7490;
  --teal-500: #0891b2;
  --teal-400: #22d3ee;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-900: #0f172a;
  --red-600: #dc2626;
  --red-100: #fee2e2;
  --red-700: #b91c1c;
  --amber-600: #d97706;
  --amber-100: #fef3c7;
  --amber-800: #92400e;
  --green-600: #16a34a;
  --green-100: #dcfce7;
  --green-800: #166534;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 4px 16px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.18);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--slate-100);
  color: var(--slate-900);
  line-height: 1.5;
  min-height: 100vh;
}

.hidden { display: none !important; }
.mono { font-family: ui-monospace, 'SF Mono', Menlo, monospace; font-size: 0.86em; }
code {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 0.85em;
  background: var(--slate-200);
  padding: 1px 5px;
  border-radius: 4px;
}

/* ---------- Buttons ---------- */
.btn {
  font: inherit;
  font-weight: 500;
  border: none;
  border-radius: 8px;
  padding: 10px 18px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}
.btn:active:not(:disabled) { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--teal-600); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--teal-500); }
.btn-safe { background: var(--green-600); color: #fff; }
.btn-safe:hover:not(:disabled) { background: #15803d; }
.btn-danger { background: var(--red-600); color: #fff; }
.btn-danger:hover:not(:disabled) { background: var(--red-700); }
.btn-ghost { background: transparent; color: var(--slate-300); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.1); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 0.875rem; }
.btn-block { width: 100%; }
.link-btn {
  background: none; border: none; color: var(--teal-600); font: inherit;
  font-weight: 500; cursor: pointer; text-decoration: underline;
}

/* ---------- Auth ---------- */
.auth-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: linear-gradient(160deg, var(--navy-900) 0%, var(--navy-800) 55%, #0e3a4f 100%);
}
.auth-card {
  background: #fff;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  padding: 40px;
  width: 100%;
  max-width: 420px;
  animation: rise 0.35s ease;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.auth-brand { text-align: center; margin-bottom: 28px; }
.brand-mark { font-size: 1.6rem; color: var(--teal-600); }
.auth-brand h1 { font-size: 1.6rem; font-weight: 700; letter-spacing: -0.02em; }
.auth-tagline { color: var(--slate-500); font-size: 0.9rem; margin-top: 4px; }
#auth-form label {
  display: block; font-size: 0.82rem; font-weight: 500;
  color: var(--slate-600); margin: 14px 0 5px;
}
#auth-form input {
  width: 100%; font: inherit; padding: 10px 12px;
  border: 1px solid var(--slate-300); border-radius: 8px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
#auth-form input:focus {
  outline: none; border-color: var(--teal-500);
  box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.15);
}
#auth-form .btn { margin-top: 20px; }
.role-picker {
  border: none;
  margin-top: 14px;
}
.role-picker legend {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--slate-600);
  margin-bottom: 6px;
}
.role-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.role-option {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  border: 1px solid var(--slate-300);
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}
.role-option:hover { border-color: var(--teal-500); }
.role-option:has(input:checked) {
  border-color: var(--teal-600);
  background: rgba(8, 145, 178, 0.06);
  box-shadow: 0 0 0 1px var(--teal-600);
}
.role-option input { margin-top: 3px; accent-color: var(--teal-600); }
.role-option-title {
  display: block;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--slate-900);
}
.role-option-desc {
  display: block;
  font-size: 0.75rem;
  color: var(--slate-500);
  line-height: 1.35;
}
.password-rules {
  font-size: 0.78rem;
  color: var(--slate-500);
  margin-top: 6px;
}
.auth-error {
  background: var(--red-100); color: var(--red-700);
  border-radius: 8px; padding: 9px 12px; font-size: 0.85rem; margin-top: 14px;
}
.auth-toggle { text-align: center; margin-top: 18px; font-size: 0.88rem; color: var(--slate-500); }
.auth-demo {
  margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--slate-200);
  text-align: center; font-size: 0.8rem; color: var(--slate-500);
}
.auth-demo p + p { margin-top: 4px; }

/* ---------- Topbar ---------- */
.topbar {
  background: var(--navy-900);
  color: #fff;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 24px;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 20;
}
.topbar-brand { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.topbar-brand .brand-mark { color: var(--teal-400); }
.topbar-nav { display: flex; gap: 4px; flex: 1; }
.nav-btn {
  background: transparent; border: none; color: var(--slate-300);
  font: inherit; font-weight: 500; font-size: 0.92rem;
  padding: 8px 14px; border-radius: 8px; cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.nav-btn:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }
.nav-btn.active { color: #fff; background: rgba(34, 211, 238, 0.18); }
.nav-count {
  display: inline-block; min-width: 20px; text-align: center;
  background: rgba(255, 255, 255, 0.14); border-radius: 999px;
  font-size: 0.75rem; padding: 1px 6px; margin-left: 4px;
}
.topbar-user { display: flex; align-items: center; gap: 12px; }
.user-badge { font-size: 0.85rem; color: var(--slate-300); }
.user-badge .role-tag {
  background: var(--teal-600); color: #fff; font-size: 0.7rem;
  font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em;
  border-radius: 4px; padding: 2px 6px; margin-left: 6px;
}

/* ---------- Main / views ---------- */
.main { max-width: 960px; margin: 0 auto; padding: 32px 24px 80px; }
.view-header { margin-bottom: 20px; }
.view-header h2 { font-size: 1.4rem; font-weight: 700; letter-spacing: -0.01em; }
.view-sub { color: var(--slate-500); font-size: 0.9rem; margin-top: 2px; }

/* ---------- Email list ---------- */
.email-list { display: flex; flex-direction: column; gap: 10px; }
.email-row {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 18px;
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 16px;
  align-items: center;
  cursor: pointer;
  border: 1px solid transparent;
  transition: border-color 0.15s, transform 0.12s ease, box-shadow 0.15s;
  animation: rise 0.25s ease;
}
.email-row:hover {
  border-color: var(--teal-500);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}
.email-row .row-from { font-size: 0.8rem; color: var(--slate-500); }
.email-row .row-subject { font-weight: 500; margin-top: 1px; }
.email-row .row-reviewed {
  font-size: 0.72rem; color: var(--slate-500);
  margin-left: 8px; font-weight: 400;
}
.email-row .row-time { font-size: 0.8rem; color: var(--slate-400); white-space: nowrap; }
.email-row .row-admin-adjusted {
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em;
  background: var(--amber-100); color: var(--amber-800);
  border-radius: 4px; padding: 2px 6px; margin-left: 8px; white-space: nowrap;
}
.email-row .row-unmatched-to {
  font-size: 0.75rem; font-weight: 400; color: var(--teal-600);
  margin-left: 8px; word-break: break-all;
}
.empty-state {
  text-align: center; color: var(--slate-500); background: #fff;
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 48px 24px;
}
.empty-state .empty-icon { font-size: 2rem; display: block; margin-bottom: 8px; }

/* ---------- Score chip ---------- */
.chip {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 48px; padding: 4px 10px; border-radius: 999px;
  font-weight: 700; font-size: 0.85rem;
}
.chip-red { background: var(--red-100); color: var(--red-700); }
.chip-amber { background: var(--amber-100); color: var(--amber-800); }
.chip-green { background: var(--green-100); color: var(--green-800); }
.chip-gray { background: var(--slate-200); color: var(--slate-600); }

/* ---------- Cards (settings) ---------- */
.card {
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 22px 24px; margin-bottom: 16px;
}
.card h3 { font-size: 1.02rem; font-weight: 700; margin-bottom: 4px; }
.card-desc { color: var(--slate-500); font-size: 0.88rem; margin-bottom: 16px; }
.threshold-row { display: flex; align-items: center; gap: 16px; }
#threshold-slider { flex: 1; accent-color: var(--teal-600); }
#threshold-input {
  width: 74px; font: inherit; padding: 8px 10px; text-align: center;
  border: 1px solid var(--slate-300); border-radius: 8px;
}
#threshold-input:focus { outline: none; border-color: var(--teal-500); }
.hint { font-size: 0.8rem; color: var(--slate-500); margin-top: 10px; }
.hint.ok { color: var(--green-800); }
.kv-row {
  display: flex; justify-content: space-between; gap: 16px;
  padding: 7px 0; border-bottom: 1px solid var(--slate-100); font-size: 0.9rem;
}
.kv-row:last-child { border-bottom: none; }
.kv-key { color: var(--slate-500); flex-shrink: 0; }
.kv-val { text-align: right; word-break: break-all; }

/* ---------- Audit list ---------- */
.audit-list { display: flex; flex-direction: column; }
.audit-row {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 10px 0; border-bottom: 1px solid var(--slate-100); font-size: 0.86rem;
}
.audit-row:last-child { border-bottom: none; }
.audit-who { color: var(--slate-600); }
.audit-change { font-weight: 500; }
.audit-when { color: var(--slate-400); white-space: nowrap; }

/* ---------- Detail panel ---------- */
.detail-overlay {
  position: fixed; inset: 0; background: rgba(11, 28, 44, 0.45);
  z-index: 30; display: flex; justify-content: flex-end;
  animation: fadeIn 0.2s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.detail-panel {
  background: #fff; width: 100%; max-width: 460px; height: 100%;
  padding: 26px 28px; overflow-y: auto;
  box-shadow: -8px 0 32px rgba(15, 23, 42, 0.2);
  animation: slideIn 0.25s ease;
}
@keyframes slideIn { from { transform: translateX(40px); opacity: 0; } to { transform: none; opacity: 1; } }
.detail-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.detail-head .btn-ghost { color: var(--slate-500); font-size: 1.3rem; line-height: 1; }
.detail-head .btn-ghost:hover { color: var(--slate-900); background: var(--slate-100); }
.detail-subject { font-size: 1.15rem; font-weight: 700; margin-bottom: 16px; letter-spacing: -0.01em; }
.detail-meta { margin-bottom: 18px; }
.detail-explanation {
  background: var(--slate-50); border: 1px solid var(--slate-200);
  border-radius: 8px; padding: 14px 16px; margin-bottom: 18px;
}
.detail-explanation h4 {
  font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--slate-500); margin-bottom: 6px;
}
.detail-explanation p { font-size: 0.9rem; color: var(--slate-700); }
.detail-labelled {
  font-size: 0.86rem; padding: 10px 14px; border-radius: 8px; margin-bottom: 16px;
  background: var(--slate-100); color: var(--slate-600);
}
.detail-admin-adjusted {
  font-size: 0.86rem; padding: 10px 14px; border-radius: 8px; margin-bottom: 16px;
  background: var(--amber-100); color: var(--amber-800);
}
.detail-actions { display: flex; gap: 10px; }
.detail-actions .btn { flex: 1; }
.assign-actions { margin-top: 4px; }
.assign-label {
  display: block; font-size: 0.82rem; font-weight: 500;
  color: var(--slate-600); margin-bottom: 6px;
}
.assign-row { display: flex; gap: 10px; }
#assign-select {
  flex: 1; font: inherit; padding: 10px 12px;
  border: 1px solid var(--slate-300); border-radius: 8px; background: #fff;
}
#assign-select:focus {
  outline: none; border-color: var(--teal-500);
  box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.15);
}

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--navy-900); color: #fff; border-radius: 8px;
  padding: 11px 20px; font-size: 0.9rem; box-shadow: var(--shadow-lg);
  z-index: 50; animation: rise 0.25s ease;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .topbar { flex-wrap: wrap; height: auto; padding: 10px 16px; gap: 10px; }
  .topbar-nav { order: 3; width: 100%; }
  .main { padding: 20px 14px 60px; }
  .email-row { grid-template-columns: 56px 1fr; }
  .email-row .row-time { display: none; }
  .threshold-row { flex-wrap: wrap; }
  .detail-panel { max-width: 100%; }
}