:root {
  --bg: #f8fafc;
  --panel: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #1f6feb;
  --primary-dark: #1859c2;
  --success: #16a34a;
  --error: #dc2626;
  --warn: #d97706;
  --paused: #64748b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  line-height: 1.5;
}

.container { max-width: 1100px; margin: 0 auto; padding: 24px; }
.container.narrow { max-width: 600px; }

.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  max-width: 1100px;
  margin: 0 auto;
}
.brand { font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
.topbar nav { display: flex; align-items: center; gap: 16px; }
.topbar nav a { text-decoration: none; color: var(--text); font-size: 14px; }
.topbar nav a.active { color: var(--primary); font-weight: 600; }
.topbar nav a.muted { color: var(--muted); }

h1 { font-size: 24px; margin: 0 0 16px 0; }
h2 { font-size: 18px; margin: 0 0 12px 0; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 16px; }
.card-label { font-size: 12px; text-transform: uppercase; color: var(--muted); letter-spacing: 0.05em; }
.card-value { font-size: 32px; font-weight: 700; margin-top: 4px; }
.card-sub { font-size: 12px; color: var(--muted); margin-top: 4px; }

.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.table th { font-size: 12px; text-transform: uppercase; color: var(--muted); letter-spacing: 0.05em; }
.table.small { font-size: 13px; }
.table tr.unsub-row { color: var(--muted); }

.badge { display: inline-block; padding: 2px 8px; border-radius: 12px; font-size: 12px; font-weight: 500; background: #f1f5f9; color: var(--text); }
.badge-draft { background: #f1f5f9; color: var(--muted); }
.badge-sending { background: #dbeafe; color: #1d4ed8; }
.badge-paused { background: #fef3c7; color: #92400e; }
.badge-completed { background: #dcfce7; color: #166534; }

.btn, .btn-primary, .btn-primary-sm {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
}
.btn:hover { background: #f8fafc; }
.btn-primary, .btn-primary-sm { background: var(--primary); color: white; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary-sm { padding: 6px 12px; font-size: 13px; }
.link-btn { background: none; border: none; color: var(--primary); cursor: pointer; padding: 0; font: inherit; }
.link-btn.danger { color: var(--error); }
.link-btn:hover { text-decoration: underline; }

input[type="text"], input[type="email"], input[type="password"], input[type="file"], textarea {
  font-family: inherit;
  font-size: 14px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: white;
}
textarea { width: 100%; min-height: 200px; font-family: ui-monospace, "SF Mono", Menlo, monospace; }

label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 12px; }
label input, label textarea { width: 100%; margin-top: 4px; font-weight: 400; }

.form-stack > * { margin-bottom: 12px; }
.inline-form { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.inline-form input { flex: 0 1 auto; }
.inline { display: inline; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.progress-row { display: flex; flex-wrap: wrap; gap: 18px; padding: 12px 0; font-size: 15px; }

.flashes { margin-bottom: 16px; }
.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 8px; font-size: 14px; }
.flash-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.flash-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }

.muted { color: var(--muted); font-size: 14px; }
a { color: var(--primary); }

.login-card { max-width: 360px; margin: 80px auto; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 32px; }
.login-card h1 { text-align: center; margin-bottom: 24px; }
.login-card form button { width: 100%; margin-top: 12px; }

code { background: #f1f5f9; padding: 2px 6px; border-radius: 4px; font-size: 13px; }
details summary { cursor: pointer; }