:root {
  color-scheme: light;
  --surface-1:      #fcfcfb;
  --surface-2:      #f9f9f7;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #898781;
  --gridline:       #e1e0d9;
  --border:         rgba(11,11,11,0.10);
  --series-1:       #2a78d6;
  --status-good:     #0ca30c;
  --status-good-bg:  #e5f6e5;
  --status-critical: #d03b3b;
  --status-critical-bg: #fbe9e9;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --surface-1:      #1a1a19;
    --surface-2:      #0d0d0d;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted:     #898781;
    --gridline:       #2c2c2a;
    --border:         rgba(255,255,255,0.10);
    --series-1:       #3987e5;
    --status-good:     #0ca30c;
    --status-good-bg:  #123a12;
    --status-critical: #e66767;
    --status-critical-bg: #3a1414;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-1:      #1a1a19;
  --surface-2:      #0d0d0d;
  --text-primary:   #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted:     #898781;
  --gridline:       #2c2c2a;
  --border:         rgba(255,255,255,0.10);
  --series-1:       #3987e5;
  --status-good:     #0ca30c;
  --status-good-bg:  #123a12;
  --status-critical: #e66767;
  --status-critical-bg: #3a1414;
}

* { box-sizing: border-box; }

/* .app / .login-screen / .modal-overlay below all set their own `display`,
   which otherwise beats the browser's default [hidden]{display:none} rule
   (author-origin CSS always wins over user-agent CSS at equal specificity)
   and makes the `hidden` attribute a no-op on those elements. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--surface-2);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

button, input, select { font-family: inherit; font-size: inherit; }

.error-text { color: var(--status-critical); font-size: 0.875rem; margin: 0; }
.form-msg { font-size: 0.875rem; margin: 0.25rem 0 0; }
.form-msg.ok { color: var(--status-good); }
.form-msg.err { color: var(--status-critical); }

/* ---------- Login ---------- */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}
.login-card h1 { margin: 0; font-size: 1.3rem; }
.login-sub { margin: -0.5rem 0 0.25rem; color: var(--text-secondary); font-size: 0.9rem; }
.login-card label { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.85rem; color: var(--text-secondary); }
.login-card input {
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--gridline);
  background: var(--surface-2);
  color: var(--text-primary);
}
.login-card button {
  margin-top: 0.4rem;
  padding: 0.6rem;
  border: none;
  border-radius: 8px;
  background: var(--series-1);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}
.login-card button:disabled { opacity: 0.6; cursor: default; }

/* ---------- Layout ---------- */
.app { min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.75rem 1.25rem;
  background: var(--surface-1);
  border-bottom: 1px solid var(--gridline);
  flex-wrap: wrap;
}
.brand { font-weight: 700; }
.brand-sub { font-weight: 400; color: var(--text-secondary); margin-left: 0.35rem; }

.tabs { display: flex; gap: 0.25rem; flex: 1; flex-wrap: wrap; }
.tab-btn {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
}
.tab-btn:hover { background: var(--surface-2); }
.tab-btn.active { background: var(--series-1); color: #fff; }

.topbar-right { display: flex; align-items: center; gap: 0.75rem; }
.whoami { color: var(--text-secondary); font-size: 0.85rem; }
.icon-btn {
  border: 1px solid var(--gridline);
  background: var(--surface-2);
  border-radius: 8px;
  width: 2.1rem;
  height: 2.1rem;
  cursor: pointer;
}
.btn-secondary {
  border: 1px solid var(--gridline);
  background: var(--surface-2);
  color: var(--text-primary);
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
  cursor: pointer;
}
.btn-secondary:hover { border-color: var(--text-muted); }
.btn-danger {
  border: 1px solid var(--status-critical);
  background: transparent;
  color: var(--status-critical);
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
}
.btn-danger:hover { background: var(--status-critical-bg); }

.content { padding: 1.25rem; flex: 1; }
.tab-panel { max-width: 1100px; margin: 0 auto; }

/* ---------- Stat tiles ---------- */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.stat-tile {
  background: var(--surface-1);
  border: 1px solid var(--gridline);
  border-radius: 10px;
  padding: 0.9rem 1rem;
}
.stat-label { color: var(--text-secondary); font-size: 0.78rem; margin-bottom: 0.35rem; }
.stat-value { font-size: 1.6rem; font-weight: 700; font-variant-numeric: proportional-nums; }
.stat-value.good { color: var(--status-good); }
.stat-value.critical { color: var(--status-critical); }

/* ---------- Toolbar ---------- */
.toolbar {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-bottom: 0.85rem;
}
.filter-group { display: flex; gap: 0.25rem; }
.filter-btn, .login-filter-btn {
  border: 1px solid var(--gridline);
  background: var(--surface-1);
  color: var(--text-secondary);
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
}
.filter-btn.active, .login-filter-btn.active { background: var(--series-1); color: #fff; border-color: var(--series-1); }
.limit-select, .auto-refresh {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.limit-select select {
  border: 1px solid var(--gridline);
  border-radius: 6px;
  padding: 0.3rem 0.4rem;
  background: var(--surface-1);
  color: var(--text-primary);
}

/* ---------- Table ---------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--gridline);
  border-radius: 10px;
  background: var(--surface-1);
}
.log-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.log-table th, .log-table td {
  text-align: left;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--gridline);
  white-space: nowrap;
}
.log-table td.wrap { white-space: normal; }
.log-table th { color: var(--text-secondary); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.02em; }
.log-table tbody tr:last-child td { border-bottom: none; }
.log-table tbody tr:hover { background: var(--surface-2); }
.empty-cell { text-align: center; color: var(--text-muted); padding: 1.5rem; white-space: normal; }

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}
.status-pill.sent { background: var(--status-good-bg); color: var(--status-good); }
.status-pill.failed { background: var(--status-critical-bg); color: var(--status-critical); }

/* ---------- Cards / forms ---------- */
.card {
  background: var(--surface-1);
  border: 1px solid var(--gridline);
  border-radius: 10px;
  padding: 1.25rem;
  max-width: 480px;
}
#tab-smtp .card, #tab-audit .card, #tab-account .card { max-width: none; }
#tab-account .stacked-form { max-width: 420px; }
.card h2 { margin: 0 0 0.25rem; font-size: 1.05rem; }
.card-sub { color: var(--text-secondary); font-size: 0.85rem; margin: 0 0 1rem; }
.card-head-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; margin-bottom: 1rem; }

.stacked-form { display: flex; flex-direction: column; gap: 0.8rem; }
.stacked-form label { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.85rem; color: var(--text-secondary); }
.stacked-form input {
  padding: 0.5rem 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--gridline);
  background: var(--surface-2);
  color: var(--text-primary);
}
.stacked-form .hint { color: var(--text-muted); font-weight: 400; }
.stacked-form button[type="submit"] {
  margin-top: 0.3rem;
  padding: 0.6rem;
  border: none;
  border-radius: 8px;
  background: var(--series-1);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}
.stacked-form button.btn-danger[type="submit"] {
  margin-top: 0;
  background: var(--status-critical);
  border: 1px solid var(--status-critical);
  color: #fff;
}
.stacked-form button.btn-danger[type="submit"]:hover { background: #b23131; }
.form-row { display: flex; gap: 0.75rem; }
.form-row label { flex: 1; }
.form-row.checks { align-items: center; gap: 1.25rem; }
.port-field { max-width: 120px; }
.checkbox-label { flex-direction: row !important; align-items: center; gap: 0.4rem !important; }

.edit-link {
  border: none;
  background: transparent;
  color: var(--series-1);
  cursor: pointer;
  font-weight: 600;
  padding: 0;
}
.badge-active { color: var(--status-good); font-weight: 600; }
.badge-inactive { color: var(--text-muted); }

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 20;
}
.modal {
  background: var(--surface-1);
  border-radius: 12px;
  border: 1px solid var(--gridline);
  padding: 1.5rem;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal h2 { margin-top: 0; }
.modal-actions { display: flex; justify-content: flex-end; gap: 0.6rem; margin-top: 0.4rem; }
.modal-actions .btn-secondary { padding: 0.55rem 0.9rem; }

@media (max-width: 640px) {
  .log-table th, .log-table td { padding: 0.5rem; }
  .form-row { flex-direction: column; }
}