:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --primary: #1f3a8a;
  --primary-dark: #16285f;
  --accent: #2563eb;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --danger: #dc2626;
  --ok: #16a34a;
  --radius: 10px;
  --shadow: 0 6px 24px rgba(15, 23, 42, 0.06);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code, pre { font-family: ui-monospace, "SF Mono", Consolas, monospace; }

.topbar {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 18px;
}
.brand .logo {
  background: rgba(255,255,255,0.18);
  width: 30px; height: 30px;
  border-radius: 7px;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 800;
}
.brand:hover { text-decoration: none; }
.topbar nav { display: flex; gap: 6px; align-items: center; }
.nav-link {
  color: rgba(255,255,255,0.92);
  padding: 7px 13px;
  border-radius: 6px;
}
.nav-link:hover { background: rgba(255,255,255,0.12); text-decoration: none; }
.nav-link.as-link {
  background: transparent; border: none; cursor: pointer;
  font: inherit;
}

.container {
  max-width: 1100px;
  margin: 28px auto;
  padding: 0 20px;
}

.hero { margin-bottom: 22px; }
.hero-title {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 10px;
}

.email-card {
  display: flex;
  gap: 10px;
  background: var(--surface);
  padding: 14px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  align-items: center;
  flex-wrap: wrap;
}
.email-field {
  flex: 1 1 280px;
  border: 1px solid var(--line);
  background: #f8fafc;
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 18px;
  font-weight: 600;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  color: var(--primary-dark);
  letter-spacing: 0.2px;
}

.email-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.status {
  color: var(--muted);
  font-size: 13px;
}
.status.fresh { color: var(--ok); }

.changer summary {
  cursor: pointer;
  color: var(--accent);
  font-size: 14px;
}
.change-form {
  margin-top: 10px;
  display: flex; gap: 6px; align-items: center; flex-wrap: wrap;
  background: var(--surface);
  padding: 10px 12px;
  border-radius: 8px;
  box-shadow: var(--shadow);
}
.change-form input, .change-form select {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 14px;
}
.change-form .at { color: var(--muted); }

.btn {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.12s;
}
.btn:hover { background: #f1f5f9; }
.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger {
  background: #fff;
  border-color: #fecaca;
  color: var(--danger);
}
.btn-danger:hover { background: #fef2f2; }
.btn-success {
  background: #fff;
  border-color: #bbf7d0;
  color: #15803d;
}
.btn-success:hover { background: #f0fdf4; }
.btn-sm { padding: 6px 10px; font-size: 13px; }

.inbox {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 16px;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-height: 460px;
  overflow: hidden;
}
@media (max-width: 800px) {
  .inbox { grid-template-columns: 1fr; }
}
.inbox-list {
  border-right: 1px solid var(--line);
  overflow-y: auto;
  max-height: 70vh;
}
.empty {
  color: var(--muted);
  padding: 30px 24px;
  text-align: center;
  font-size: 14px;
}
.msg-row {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  text-align: left;
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  padding: 12px 14px;
  cursor: pointer;
  font: inherit;
  color: inherit;
}
.msg-row:hover { background: #f8fafc; }
.msg-row.active { background: #eff6ff; }
.msg-from { font-weight: 600; color: var(--primary-dark); font-size: 14px; }
.msg-time { color: var(--muted); font-size: 12px; text-align: right; }
.msg-subject { color: var(--text); font-size: 13px; grid-column: 1 / -1; margin-top: 3px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.message-pane {
  padding: 22px 24px;
  overflow-y: auto;
  max-height: 70vh;
}
.message-pane h3 { margin: 0 0 12px; }
.message-pane .meta { color: var(--muted); font-size: 13px; margin-bottom: 16px; }
.message-pane .meta div { margin: 2px 0; }
.message-body {
  background: #fafafa;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  margin-top: 8px;
  overflow-x: auto;
}
.message-body iframe {
  width: 100%; border: 0; min-height: 320px;
}
.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--line); margin-bottom: 0; }
.tab {
  padding: 7px 12px; cursor: pointer; background: transparent; border: 0;
  font: inherit; color: var(--muted); border-bottom: 2px solid transparent;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

.footer { padding: 20px 0; color: var(--muted); text-align: center; font-size: 12px; }

/* Admin */
.admin .card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 24px;
  margin-bottom: 18px;
}
.admin .card h2 { margin: 0 0 12px; font-size: 18px; }
.muted { color: var(--muted); }
.row-form {
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
  margin-bottom: 14px;
}
.row-form.col { flex-direction: column; align-items: stretch; max-width: 360px; }
.row-form input {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  min-width: 220px;
}
table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th, table.data td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
}
table.data th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.badge { padding: 2px 8px; border-radius: 999px; font-size: 12px; }
.badge.ok { background: #dcfce7; color: #166534; }
.badge.off { background: #fee2e2; color: #991b1b; }
.actions { display: flex; gap: 6px; }

.alert {
  padding: 10px 14px;
  border-radius: 8px;
  margin: 10px 0;
}
.alert.error { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }
.alert.info  { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; word-break: break-all; }
.hidden { display: none; }

.code {
  background: #0f172a; color: #e2e8f0; padding: 14px; border-radius: 8px;
  white-space: pre; overflow-x: auto; font-size: 13px;
}

/* Auth page */
.auth-bg {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex; align-items: center; justify-content: center;
}
.auth-wrap { width: 100%; padding: 20px; }
.auth-card {
  background: #fff;
  width: 360px;
  margin: 0 auto;
  padding: 28px 28px 22px;
  border-radius: var(--radius);
  box-shadow: 0 20px 50px rgba(0,0,0,0.2);
  display: flex; flex-direction: column; gap: 12px;
}
.auth-brand { color: var(--primary); margin-bottom: 4px; }
.auth-brand .logo { background: var(--primary); color: #fff; }
.auth-card h1 { margin: 0 0 4px; font-size: 22px; }
.auth-card label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.auth-card input {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 15px;
}