/* Main Styles for URL Generator */
:root {
  --primary-color: #4a6fa5;
  --secondary-color: #166088;
  --accent-color: #4fc3f7;
  --text-color: #333;
  --light-color: #f8f9fa;
  --border-color: #dee2e6;
  --success-color: #28a745;
  --danger-color: #dc3545;
  --warning-color: #ffc107;
  --info-color: #17a2b8;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: #f5f7fa;
  padding: 0;
  margin: 0;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

header {
  background-color: var(--primary-color);
  color: white;
  padding: 1rem 0;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
}

nav ul {
  display: flex;
  list-style: none;
}

nav ul li {
  margin-left: 1.5rem;
}

nav ul li a {
  color: white;
  text-decoration: none;
  transition: color 0.3s;
}

nav ul li a:hover {
  color: var(--accent-color);
}

.main-content {
  padding: 2rem 0;
}

.card {
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 2rem;
  margin-bottom: 2rem;
}

.card-header {
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.card-header h2 {
  color: var(--primary-color);
  font-size: 1.5rem;
}

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

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

input[type="text"],
input[type="password"],
input[type="url"],
textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 1rem;
  transition: border-color 0.3s;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="url"]:focus,
textarea:focus {
  border-color: var(--primary-color);
  outline: none;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.2s;
}

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

.btn-primary:hover {
  background-color: var(--secondary-color);
  transform: translateY(-2px);
}

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

.btn-success:hover {
  background-color: #218838;
  transform: translateY(-2px);
}

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

.btn-danger:hover {
  background-color: #c82333;
}

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

.alert-success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.alert-danger {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.result-box {
  background-color: #f8f9fa;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 1rem;
  margin-top: 1.5rem;
}

.copy-btn {
  background-color: var(--info-color);
  color: white;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin-top: 0.5rem;
}

.copy-btn:hover {
  background-color: #138496;
}

footer {
  background-color: var(--primary-color);
  color: white;
  padding: 1.5rem 0;
  text-align: center;
  margin-top: 2rem;
}

/* Login Form Specific Styles */
.login-form {
  max-width: 400px;
  margin: 0 auto;
}

/* URL History Styles */
.url-history {
  padding: 1rem;
  overflow-x: auto;
}

.no-urls {
  text-align: center;
  padding: 2rem;
  color: #6c757d;
  font-style: italic;
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.history-table th,
.history-table td {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
}

.history-table th {
  background-color: #f1f5f9;
  font-weight: 600;
  text-align: left;
}

.history-table tr:nth-child(even) {
  background-color: #f8f9fa;
}

.history-table tr:hover {
  background-color: #e9ecef;
}

.history-url {
  width: 200px;
  max-width: 100%;
  padding: 0.3rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.875rem;
  margin-right: 0.5rem;
}

.btn-small {
  font-size: 0.875rem;
  padding: 0.25rem 0.5rem;
}

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

.btn-info:hover {
  background-color: #138496;
}

/* User Management Styles */
.user-management {
  padding: 1rem;
}

.users-section, 
.add-user-section {
  margin-bottom: 2rem;
}

.users-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.users-table th,
.users-table td {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  text-align: left;
}

.users-table th {
  background-color: #f1f5f9;
  font-weight: 600;
}

.add-user-form {
  max-width: 400px;
  margin-top: 1rem;
}

select {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: white;
}

/* Change Password Form Styles */
.change-password-form {
  max-width: 400px;
  margin: 0 auto;
  padding: 1rem;
}

/* Random Content Management Styles */
.random-content-management {
  padding: 1rem;
}

.random-content-section {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
}

.random-content-section:last-child {
  border-bottom: none;
}

.content-form {
  margin: 1rem 0;
}

.content-form textarea {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  resize: vertical;
}

.content-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.content-table th,
.content-table td {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  text-align: left;
}

.content-table th {
  background-color: #f1f5f9;
  font-weight: 600;
}

.no-content {
  text-align: center;
  font-style: italic;
  color: var(--text-color);
}

/* Responsive Styles */
@media (max-width: 768px) {
  header .container {
    flex-direction: column;
    text-align: center;
  }
  
  nav ul {
    margin-top: 1rem;
    justify-content: center;
  }
  
  nav ul li {
    margin: 0 0.75rem;
  }
}