:root {
  --bg: #f4f6f8;
  --panel: #fff;
  --ink: #1c2128;
  --muted: #66707c;
  --line: #e3e7ec;
  --brand: #e31c23;
  --brand-dark: #c4161c;
  --ok: #0f7a45;
  --warn: #9a6b00;
  --font: "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
}
a { color: var(--brand); text-decoration: none; }
.shell { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.side {
  background: #1c2128;
  color: #fff;
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.brand { font-weight: 800; font-size: 1.2rem; }
.brand span { color: #ff8b90; }
.side nav { display: grid; gap: 0.25rem; }
.side nav a {
  color: rgba(255,255,255,0.8);
  padding: 0.55rem 0.7rem;
  border: 1px solid transparent;
}
.side nav a.on, .side nav a:hover {
  background: rgba(255,255,255,0.08);
  color: #fff;
  border-color: rgba(255,255,255,0.08);
}
.side-foot { margin-top: auto; }
.side-foot button {
  width: 100%;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
  padding: 0.5rem;
  cursor: pointer;
}
.main { padding: 1.5rem; }
h1 { margin: 0 0 1rem; font-size: 1.5rem; }
h2 { margin: 0 0 0.75rem; font-size: 1.1rem; }
.muted { color: var(--muted); }
.tiny { font-size: 0.78rem; margin-top: 0.35rem; }
.row { display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: center; }
.grid { display: grid; gap: 0.85rem; }
.grid.stats { grid-template-columns: repeat(4, minmax(0,1fr)); }
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 1rem;
}
.card .num { font-size: 1.8rem; font-weight: 800; }
label { display: grid; gap: 0.3rem; font-weight: 600; font-size: 0.9rem; }
input, textarea, select, button, .btn {
  font: inherit;
  border-radius: 0;
}
input, textarea, select {
  border: 1px solid #cfd5db;
  padding: 0.55rem 0.65rem;
  background: #fff;
}
textarea { min-height: 220px; width: 100%; }
button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
}
button.secondary, .btn.secondary {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
}
button.danger, .btn.danger {
  background: var(--brand-dark);
  color: #fff;
}
button.btn-sm, .btn.btn-sm, .btn-sm {
  padding: 0.3rem 0.55rem;
  font-size: 0.8rem;
}
button:hover, .btn:hover { filter: brightness(0.96); }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { border-bottom: 1px solid var(--line); text-align: left; padding: 0.65rem 0.5rem; font-size: 0.92rem; }
th { color: var(--muted); font-weight: 700; }
.badge {
  display: inline-block;
  padding: 0.15rem 0.4rem;
  background: #eee;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}
.badge.sending, .badge.queued { background: #e8f1ff; color: #1a4ea3; }
.badge.completed { background: #e5f7ec; color: var(--ok); }
.badge.draft, .badge.paused { background: #fff4d6; color: var(--warn); }
.badge.cancelled, .badge.failed { background: #ffe5e5; color: var(--brand); }
.flash {
  padding: 0.75rem 0.9rem;
  margin-bottom: 1rem;
  border: 1px solid var(--line);
  background: #fff;
}
.flash.success { background: #e9f8ef; border-color: #b7e5c7; }
.flash.error { background: #ffecec; border-color: #f0b4b4; }
.notice {
  background: #fff8e8;
  border: 1px solid #efe0b8;
  padding: 0.85rem 1rem;
  margin-bottom: 1rem;
  color: #6b5a30;
  font-size: 0.92rem;
}
.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: linear-gradient(160deg, #1c2128, #3a1518);
}
.login-card {
  width: min(100%, 400px);
  background: #fff;
  border: 1px solid var(--line);
  padding: 1.5rem;
}
.login-card h1 { margin-bottom: 0.25rem; }
.form-grid { display: grid; gap: 0.85rem; }
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .side { flex-direction: row; flex-wrap: wrap; align-items: center; }
  .side nav { display: flex; flex-wrap: wrap; }
  .side-foot { margin-top: 0; margin-left: auto; }
  .grid.stats { grid-template-columns: 1fr 1fr; }
}