:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --bg: #f4f6f9;
  --surface: #ffffff;
  --text: #202124;
  --muted: #5f6368;
  --border: #e0e0e0;
  --success: #188038;
  --success-bg: #e6f4ea;
  --error: #c5221f;
  --error-bg: #fce8e6;
  --info: #1a73e8;
  --info-bg: #e8f0fe;
  --warning: #b06000;
  --warning-bg: #fef7e0;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
}

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

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

/* --- Barra de navegación --- */
.navbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
}
.navbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  height: 56px;
  gap: 8px;
  flex-wrap: wrap;
}
.navbar .brand { font-weight: 700; font-size: 18px; color: var(--text); margin-right: 16px; }
.navbar a.nav-link {
  padding: 6px 10px;
  border-radius: 4px;
  color: var(--muted);
  font-size: 14px;
}
.navbar a.nav-link:hover { background: var(--bg); text-decoration: none; }
.navbar a.nav-link.active { color: var(--primary); font-weight: 600; }
.navbar .spacer { flex: 1; }

/* --- Tarjetas y layout --- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }

h1 { font-size: 24px; margin: 0 0 16px; }
h2 { font-size: 18px; margin: 0 0 12px; }
h3 { font-size: 16px; margin: 0 0 8px; }
.page-title { margin: 24px 0 16px; }

.stat { text-align: center; }
.stat .value { font-size: 28px; font-weight: 700; }
.stat .label { color: var(--muted); font-size: 13px; }

/* --- Tablas --- */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--muted); font-weight: 600; background: #fafafa; }
tr:hover td { background: #fafafa; }
.table-wrap { overflow-x: auto; }

/* --- Formularios --- */
label { display: block; margin-bottom: 4px; font-weight: 600; font-size: 14px; }
input[type="text"], input[type="email"], input[type="password"], input[type="number"],
input[type="datetime-local"], select, textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary); border-color: var(--primary); }
.form-group { margin-bottom: 16px; }
textarea { resize: vertical; min-height: 100px; }
.help { color: var(--muted); font-size: 13px; margin-top: 4px; }

.btn {
  display: inline-block;
  padding: 9px 16px;
  border: none;
  border-radius: 6px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn.secondary { background: #e8eaed; color: var(--text); }
.btn.secondary:hover { background: #d8dadd; }
.btn.danger { background: var(--error); }
.btn.danger:hover { background: #a50e0c; }
.btn.success { background: var(--success); }
.btn.small { padding: 5px 10px; font-size: 13px; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* --- Alertas (flash) --- */
.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.alert.success { background: var(--success-bg); color: var(--success); border: 1px solid #b7dfc2; }
.alert.error { background: var(--error-bg); color: var(--error); border: 1px solid #f5c6c5; }
.alert.info { background: var(--info-bg); color: var(--info); border: 1px solid #c6dafc; }

/* --- Badges de estado --- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}
.badge.pendiente, .badge.PENDING { background: #fff3cd; color: #856404; }
.badge.procesando, .badge.PROCESSING { background: #cfe8ff; color: #0b5394; }
.badge.enviada, .badge.SENT { background: #d4edda; color: #155724; }
.badge.error, .badge.ERROR { background: #f8d7da; color: #721c24; }
.badge.activa, .badge.ACTIVE { background: #d4edda; color: #155724; }
.badge.bloqueada, .badge.BLOCKED { background: #f8d7da; color: #721c24; }
.badge.prueba, .badge.TRIAL { background: #cfe8ff; color: #0b5394; }
.badge.inactiva, .badge.INACTIVE, .badge.vencida, .badge.EXPIRED { background: #e9ecef; color: #495057; }
.badge.cancelada, .badge.CANCELLED { background: #fff3cd; color: #856404; }

/* --- Varios --- */
.auth-box { max-width: 420px; margin: 60px auto; }
.center { text-align: center; }
.muted { color: var(--muted); }
.mt { margin-top: 16px; }
.mb { margin-bottom: 16px; }
.flex { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.inline-form { display: inline; }
.divider { border-top: 1px solid var(--border); margin: 20px 0; }
.token { font-family: monospace; word-break: break-all; background: #f8f9fa; padding: 6px 10px; border-radius: 4px; }

.schedule-rule { border: 1px solid var(--border); border-radius: 6px; padding: 14px; margin-bottom: 12px; background: #fafafa; }
.day-check { display: inline-flex; align-items: center; gap: 4px; margin-right: 8px; }
.day-check input { width: auto; }

.guide ol { padding-left: 20px; }
.guide li { margin-bottom: 6px; }