:root {
  --primary: #2563EB;
  --primary-dark: #1E40AF;
  --secondary: #10B981;
  --bg-soft: #F4F6FB;
  --text-dark: #1E293B;
  --text-muted: #64748B;
  --card-radius: 16px;
}

body {
  font-family: 'Poppins', sans-serif;
  background: var(--bg-soft);
  color: var(--text-dark);
}

/* Navbar */
.app-navbar {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  padding: 14px 0;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}
.app-navbar .navbar-brand {
  color: #fff;
  font-weight: 700;
  font-size: 1.3rem;
}
.app-navbar .nav-link {
  color: rgba(255,255,255,0.9) !important;
  font-weight: 500;
  border-radius: 8px;
  padding: 8px 14px !important;
  transition: 0.2s;
}
.app-navbar .nav-link:hover {
  background: rgba(255,255,255,0.15);
  color: #fff !important;
}

.app-main { min-height: 80vh; }

.app-footer {
  color: var(--text-muted);
  background: #fff;
  border-top: 1px solid #E2E8F0;
}

/* Hero */
.hero-section {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 70px 20px;
  border-radius: 0 0 30px 30px;
}
.hero-section h1 { font-weight: 700; }
.hero-section p { color: rgba(255,255,255,0.9); }

/* Cards */
.card-modern {
  background: #fff;
  border: none;
  border-radius: var(--card-radius);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
  transition: transform 0.2s, box-shadow 0.2s;
}
.card-modern:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.1);
}

.stat-card {
  border-radius: var(--card-radius);
  padding: 22px;
  color: #fff;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}
.stat-card .stat-icon { font-size: 1.8rem; opacity: 0.85; }
.stat-card h3 { font-weight: 700; margin: 6px 0 0; }
.stat-card small { opacity: 0.9; }

.bg-grad-blue { background: linear-gradient(135deg, #3B82F6, #1D4ED8); }
.bg-grad-green { background: linear-gradient(135deg, #34D399, #059669); }
.bg-grad-orange { background: linear-gradient(135deg, #FBBF24, #D97706); }
.bg-grad-purple { background: linear-gradient(135deg, #A78BFA, #7C3AED); }

/* Forms */
.form-modern label { font-weight: 500; color: var(--text-dark); }
.form-modern .form-control, .form-modern .form-select {
  border-radius: 10px;
  border: 1px solid #E2E8F0;
  padding: 10px 14px;
}
.form-modern .form-control:focus, .form-modern .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}
.section-title {
  font-weight: 600;
  color: var(--primary-dark);
  border-left: 4px solid var(--primary);
  padding-left: 10px;
  margin-bottom: 18px;
}

.btn-primary-modern {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border: none;
  border-radius: 10px;
  padding: 10px 24px;
  font-weight: 600;
  color: #fff;
}
.btn-primary-modern:hover { opacity: 0.92; color: #fff; }

/* Table */
.table-modern {
  background: #fff;
  border-radius: var(--card-radius);
  overflow: hidden;
}
.table-modern thead {
  background: var(--primary);
  color: #fff;
}
.table-modern th, .table-modern td {
  vertical-align: middle;
  padding: 12px 14px;
}
.table-modern tbody tr:hover { background: #F8FAFC; }

.badge-status-sent { background: #DCFCE7; color: #15803D; }
.badge-status-pending { background: #FEF9C3; color: #A16207; }
.badge-status-failed { background: #FEE2E2; color: #B91C1C; }
.badge-soft { border-radius: 20px; padding: 6px 12px; font-weight: 600; font-size: 0.78rem; }

.alert-modern { border-radius: 12px; border: none; }

.filter-card { border-radius: var(--card-radius); background: #fff; padding: 22px; box-shadow: 0 4px 20px rgba(15,23,42,0.06); }