/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  background: #1a1a2e;
  color: #e0e0e0;
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: #4ecdc4;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* === Layout === */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.container-narrow {
  max-width: 420px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* === Header === */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid #2a2a4a;
  margin-bottom: 2rem;
}

.header h1 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #ffffff;
}

/* === Cards & Panels === */
.card {
  background: #16213e;
  border: 1px solid #2a2a4a;
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 1rem;
}

.card h3 {
  font-size: 0.95rem;
  font-weight: 500;
  color: #cccccc;
  margin-bottom: 0.5rem;
}

/* === Balance Display === */
.balance-display {
  text-align: center;
  padding: 2rem 1.5rem;
}

.balance-display .amount {
  font-size: 3rem;
  font-weight: 700;
  color: #4ecdc4;
}

.balance-display .label {
  font-size: 1rem;
  color: #999;
  margin-top: 0.25rem;
}

/* === Package Grid === */
.package-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.package-card {
  background: #1a1a2e;
  border: 1px solid #2a2a4a;
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
  transition: border-color 0.2s;
}

.package-card:hover {
  border-color: #4ecdc4;
}

.package-card .name {
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.package-card .price {
  font-size: 1.5rem;
  font-weight: 700;
  color: #4ecdc4;
  margin-bottom: 0.75rem;
}

.package-card .details {
  font-size: 0.85rem;
  color: #999;
  margin-bottom: 1rem;
}

/* === Forms === */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: #cccccc;
  margin-bottom: 0.35rem;
}

.form-group input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background: #16213e;
  border: 1px solid #2a2a4a;
  border-radius: 6px;
  color: #ffffff;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus {
  border-color: #4ecdc4;
}

.form-group input::placeholder {
  color: #666;
}

/* === Buttons === */
.btn {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  border: none;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.2s;
  text-align: center;
}

.btn:hover {
  opacity: 0.85;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: #4ecdc4;
  color: #1a1a2e;
}

.btn-secondary {
  background: #3a3a5a;
  color: #e0e0e0;
}

.btn-block {
  display: block;
  width: 100%;
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
}

/* === Tables === */
table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  text-align: left;
  font-size: 0.8rem;
  font-weight: 600;
  color: #999;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid #2a2a4a;
}

tbody td {
  padding: 0.6rem 0.75rem;
  font-size: 0.9rem;
  border-bottom: 1px solid #1e1e3a;
}

tbody tr:hover {
  background: #1e1e3a;
}

/* === Toast === */
.toast {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  background: #2d6a4f;
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: 6px;
  font-size: 0.9rem;
  z-index: 1000;
  animation: toast-fade 4s ease-in-out forwards;
}

@keyframes toast-fade {
  0% { opacity: 0; transform: translateY(-10px); }
  10% { opacity: 1; transform: translateY(0); }
  80% { opacity: 1; }
  100% { opacity: 0; }
}

/* === Error Message === */
.error-msg {
  color: #ff6b6b;
  font-size: 0.85rem;
  margin-top: 0.5rem;
  min-height: 1.25rem;
}

/* === Chart Container === */
.chart-container {
  position: relative;
  height: 250px;
  margin-top: 1rem;
}

/* === Utility === */
.text-center {
  text-align: center;
}

.text-muted {
  color: #999;
  font-size: 0.85rem;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }

/* === Status Badges === */
.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-success {
  background: #2d6a4f;
  color: #a7f3d0;
}

.badge-error {
  background: #6a2d2d;
  color: #f3a7a7;
}

.badge-pending {
  background: #6a5a2d;
  color: #f3e5a7;
}

/* === Responsive === */
@media (max-width: 600px) {
  .container {
    padding: 1rem;
  }

  .balance-display .amount {
    font-size: 2rem;
  }

  .package-grid {
    grid-template-columns: 1fr;
  }
}