:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-weak: #eef2ff;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;
  --warning-bg: #fef9c3;
  --warning-border: #fde68a;
  --warning-text: #854d0e;
  --success: #16a34a;
  --success-bg: #f0fdf4;
  --success-border: #bbf7d0;
  --success-text: #166534;
  --radius-card: 12px;
  --radius-control: 8px;
  --shadow-card: 0 1px 2px rgba(16, 24, 40, 0.04), 0 1px 3px rgba(16, 24, 40, 0.06);
  --shadow-pop: 0 4px 6px rgba(16, 24, 40, 0.05), 0 10px 24px rgba(16, 24, 40, 0.12);
  --focus-ring: 0 0 0 3px rgba(99, 102, 241, 0.35);
}

* {
  box-sizing: border-box;
}

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

/* ---------- Top navigation ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-weak);
}

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.topbar-nav a {
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-control);
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.topbar-nav a:hover {
  color: var(--text);
  background: var(--bg);
}

.topbar-nav a.active {
  color: var(--accent-hover);
  background: var(--accent-weak);
}

.topbar-nav a:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.topbar-nav .user {
  margin: 0 0.5rem 0 0.75rem;
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 500;
}

/* ---------- Page scaffold ---------- */

.content {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2.25rem 1.5rem 4rem;
}

.content h1 {
  margin: 0 0 0.35rem;
  font-size: 1.5rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.lede {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* ---------- Cards ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}

.card-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card-hint {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.875rem;
}

.card-head {
  margin-bottom: 1.15rem;
}

.card > table:first-child,
.table-scroll:first-child {
  margin-top: 0.25rem;
}

/* ---------- Banners ---------- */

.banner-warning,
.banner-success,
.banner-error {
  margin: 0 0 1.25rem;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-control);
  border: 1px solid;
  font-size: 0.9rem;
}

.banner-warning {
  background: var(--warning-bg);
  border-color: var(--warning-border);
  color: var(--warning-text);
}

.banner-success {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success-text);
}

.banner-error {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--danger);
}

/* ---------- Tables ---------- */

.table-scroll {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
}

th,
td {
  padding: 0.7rem 0.85rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  /* break-word (not anywhere): long emails/subjects wrap, but columns keep a
     readable min width — on phones the table scrolls inside .table-scroll instead. */
  overflow-wrap: break-word;
}

th {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  white-space: nowrap;
}

tbody tr {
  transition: background-color 0.15s ease;
}

tbody tr:hover {
  background: #f8faff;
}

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

.nowrap {
  white-space: nowrap;
}

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

.cell-strong {
  font-weight: 550;
}

/* ---------- Pills / status ---------- */

.pill {
  display: inline-block;
  padding: 0.1rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.pill-accent {
  background: var(--accent-weak);
  border-color: #dcdffe;
  color: var(--accent-hover);
}

.pill-success {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success-text);
}

.pill-error {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--danger);
}

/* ---------- Forms ---------- */

label {
  font-size: 0.85rem;
  font-weight: 550;
  color: var(--text);
}

input[type="text"],
input[type="password"],
select {
  width: 100%;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 0.925rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input[type="text"]:focus,
input[type="password"]:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
}

/* Strip native select chrome (Safari draws its own bezel otherwise) and
   mirror the text-input metrics so mixed form rows line up pixel-exact. */
select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding-right: 2.25rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6l4 4 4-4' stroke='%2364748B' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px 16px;
  /* Input height = 1.55 line box + 0.55rem×2 padding + 1px×2 border; some
     engines undersize select line boxes, so pin the floor explicitly. */
  min-height: calc(1.55em + 1.1rem + 2px);
  cursor: pointer;
}

select:hover:not(:disabled) {
  border-color: #cbd5e1;
}

/* background-color (not the shorthand) so the arrow image survives :disabled. */
select:disabled {
  background-color: var(--bg);
  color: var(--muted);
  cursor: not-allowed;
}

input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--accent);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem 1.25rem;
}

/* Give the sender field (input + scan button) the widest track on desktop. */
@media (min-width: 900px) {
  .mapping-form .field-grid {
    grid-template-columns: minmax(150px, 0.7fr) minmax(340px, 1.7fr) 1fr 1fr;
  }
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-width: 0;
}

.form-error {
  margin: 0 0 1rem;
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--danger-border);
  border-radius: var(--radius-control);
  background: var(--danger-bg);
  color: var(--danger);
  font-size: 0.9rem;
}

.form-actions {
  margin-top: 1.25rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease,
    box-shadow 0.15s ease;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent-hover);
  background: var(--accent-weak);
}

.btn-sm {
  padding: 0.4rem 0.7rem;
  font-size: 0.83rem;
  white-space: nowrap;
}

.btn-block {
  width: 100%;
}

button.btn-link {
  margin: 0;
  padding: 0;
  border: none;
  background: none;
  color: var(--accent);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 4px;
}

button.btn-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

button.btn-link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

button.btn-link.danger {
  color: var(--danger);
}

/* ---------- Links ---------- */

.row-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  white-space: nowrap;
}

.row-actions form {
  margin: 0;
}

.row-actions a,
.back-link a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 4px;
}

.row-actions a:hover,
.back-link a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.row-actions a:focus-visible,
.back-link a:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.back-link {
  margin-top: 1.25rem;
}

/* ---------- Sender combobox ---------- */

.input-with-action {
  display: flex;
  /* stretch = the scan button always matches the combobox input height. */
  align-items: stretch;
  gap: 0.5rem;
}

.combobox {
  position: relative;
  flex: 1;
  min-width: 0;
}

.combobox-panel {
  position: absolute;
  z-index: 30;
  top: calc(100% + 6px);
  left: 0;
  width: max(100%, 420px);
  max-width: min(calc(100vw - 2.5rem), 540px);
  max-height: 320px;
  overflow-y: auto;
  padding: 0.3rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  box-shadow: var(--shadow-pop);
}

.combobox-option {
  padding: 0.5rem 0.65rem;
  border-radius: 6px;
  cursor: pointer;
}

.combobox-option.is-active {
  background: var(--accent-weak);
}

.combobox-option-primary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
}

.combobox-option-address {
  font-size: 0.9rem;
  font-weight: 550;
  overflow-wrap: anywhere;
}

.combobox-option-count {
  flex-shrink: 0;
  color: var(--muted);
  font-size: 0.75rem;
}

.combobox-option-meta {
  margin-top: 0.1rem;
  color: var(--muted);
  font-size: 0.8rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.combobox-empty {
  padding: 0.65rem 0.75rem;
  color: var(--muted);
  font-size: 0.85rem;
}

/* ---------- Page-specific bits ---------- */

.login-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  padding-top: 11vh;
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1rem;
}

.login-card {
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.75rem;
}

.login-card h1 {
  margin: 0 0 0.75rem;
  font-size: 1.2rem;
  font-weight: 650;
}

.login-card label {
  margin-top: 0.6rem;
}

.login-card .btn {
  margin-top: 1.25rem;
}

.run-form {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 0;
}

.baseline-form {
  margin: 1rem 0 0;
}

.test-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.test-actions form {
  margin: 0;
}

.empty {
  margin: 0;
  padding: 1.5rem 0;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}