/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

header h1 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 24px;
}

nav {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

nav a {
    color: #555;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background-color 0.3s;
}

nav a:hover {
    background-color: #e9ecef;
}

nav a.active {
    background-color: #007bff;
    color: white;
}

/* Main Content */
main {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 28px;
}

h3 {
    color: #34495e;
    margin-bottom: 15px;
    font-size: 20px;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: #666;
    font-size: 12px;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 25px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: background-color 0.3s;
    font-family: inherit;
}

.btn-primary {
    background-color: #007bff;
    color: white;
}

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #545b62;
}

.btn-success {
    background-color: #28a745;
    color: white;
}

.btn-success:hover {
    background-color: #218838;
}

.btn-danger {
    background-color: #dc3545;
    color: white;
}

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

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
}

/* Messages */
.message {
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
}

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

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

.message.warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* Login Page */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 10px;
}

.login-box h2 {
    text-align: center;
    color: #666;
    font-size: 18px;
    margin-bottom: 30px;
}

/* Dashboard */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #dee2e6;
}

.stat-card h3 {
    margin-bottom: 10px;
    font-size: 16px;
    color: #666;
}

.stat-value {
    font-size: 32px;
    font-weight: bold;
    color: #2c3e50;
    margin-bottom: 15px;
}

.stat-value.success {
    color: #28a745;
}

.stat-value.warning {
    color: #ffc107;
}

.quick-actions {
    margin-bottom: 30px;
}

.action-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.info-section {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-top: 30px;
}

.info-section ol {
    margin-left: 20px;
}

.info-section li {
    margin-bottom: 10px;
}

.info-section a {
    color: #007bff;
    text-decoration: none;
}

.info-section a:hover {
    text-decoration: underline;
}

/* Recipients */
.recipients-section {
    display: grid;
    gap: 30px;
}

.add-recipients {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
}

.recipients-list {
    margin-top: 20px;
}

.recipients-table {
    margin-top: 15px;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

table th,
table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #dee2e6;
}

table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #555;
}

table tr:hover {
    background-color: #f8f9fa;
}

.empty-state {
    padding: 40px;
    text-align: center;
    color: #666;
    background: #f8f9fa;
    border-radius: 8px;
}

/* Send Page */
.recipient-selection {
    margin-bottom: 15px;
}

.recipients-checkbox-list {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 15px;
    background: #f8f9fa;
}

.checkbox-label {
    display: block;
    padding: 8px;
    margin-bottom: 5px;
    cursor: pointer;
    border-radius: 4px;
}

.checkbox-label:hover {
    background-color: #e9ecef;
}

.checkbox-label input[type="checkbox"] {
    margin-right: 10px;
}

.preview-box {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 4px;
    border: 1px solid #dee2e6;
}

.html-preview {
    margin-top: 10px;
    padding: 15px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    max-height: 300px;
    overflow-y: auto;
}

.send-results {
    margin-top: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
}

.send-results ul {
    margin-left: 20px;
    margin-top: 10px;
}

.send-results li {
    margin-bottom: 5px;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    main {
        padding: 20px;
    }
    
    nav {
        flex-direction: column;
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-buttons .btn {
        width: 100%;
    }
}