:root {
  --primary-color: #0d9488;
  --primary-hover: #0f766e;
  --accent-color: #f59e0b;
  --bg-light: #f8fafc;
  --card-bg: #ffffff;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --radius-sm: 8px;
  --radius-md: 14px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-hover: 0 10px 20px rgba(13, 148, 136, 0.12);
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-light);
  color: var(--text-main);
  margin: 0;
  padding-top: 24px;
  padding-bottom: 40px;
}

.recharge-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

/* Service Selector Cards Grid */
.service-card {
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.service-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.service-card.active {
  border-color: var(--primary-color);
  background-color: rgba(13, 148, 136, 0.06);
}

.service-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 8px;
  background: var(--bg-light);
}

.service-card.active .service-icon-box {
  background: var(--primary-color);
  color: #ffffff !important;
}

.service-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
}

/* Form Controls */
.form-control-custom, .form-select-custom {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  padding: 12px 16px;
  font-size: 0.92rem;
  background-color: #f1f5f9;
  transition: all 0.2s ease;
}

.form-control-custom:focus, .form-select-custom:focus {
  background-color: #ffffff;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.btn-recharge {
  background-color: var(--primary-color);
  color: #ffffff;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  border: none;
  transition: background-color 0.2s ease;
  width: 100%;
}

.btn-recharge:hover {
  background-color: var(--primary-hover);
  color: #ffffff;
}

/* Popular Plan Cards */
.plan-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  transition: all 0.2s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
}

.plan-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.plan-price {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
}

.badge-validity {
  background: rgba(13, 148, 136, 0.1);
  color: var(--primary-color);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 6px;
}