:root {
  --primary-color: #1976d2;
  --secondary-color: #2196f3;
  --bg-color: #f5f5f5;
  --text-color: #333;
  --white: #ffffff;
  --border-radius: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.card {
  background-color: var(--white);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 400px;
}

h2 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--primary-color);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 4px;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
  transition: var(--transition);
  text-decoration: none;
  text-align: center;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

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

/* Dashboard Styles */
.navbar {
  background-color: var(--primary-color);
  color: white;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar a {
  color: white;
  text-decoration: none;
  margin-left: 1.5rem;
  font-size: 0.9rem;
  opacity: 0.8;
  transition: var(--transition);
}

.navbar a:hover {
  opacity: 1;
  text-decoration: underline;
}

.container {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: white;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid #eee;
}

th {
  background-color: #f8f9fa;
  font-weight: 600;
}

.status-badge {
  padding: 0.25rem 0.5rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: bold;
}

.status-sent {
  background-color: #e3f2fd;
  color: #1976d2;
}

.status-pending {
  background-color: #f5f5f5;
  color: #757575;
}

.alert {
  padding: 1rem;
  border-radius: 4px;
  margin-bottom: 1.5rem;
}

.alert-success {
  background-color: #d4edda;
  color: #155724;
}

.alert-error {
  background-color: #f8d7da;
  color: #721c24;
}

.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  justify-content: center;
  align-items: center;
  padding: 1rem;
}

.modal-content {
  background-color: white;
  padding: 2.5rem 2rem;
  border-radius: var(--border-radius);
  width: 100%;
  max-width: 500px;
  position: relative;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  cursor: pointer;
  font-size: 2rem;
  color: #888;
  line-height: 1;
  transition: var(--transition);
}

.close:hover {
  color: #333;
}

@media (max-width: 576px) {
  .modal-content {
    padding: 2rem 1.25rem;
    margin: 0 0.5rem;
  }
}