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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    text-align: center;
    position: relative;
}

.user-menu {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
    align-items: center;
}

.user-menu span {
    color: white;
    font-weight: 600;
    margin-right: 10px;
}

.btn-login,
.btn-register,
.btn-logout {
    padding: 8px 15px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.9em;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
    color: white;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-login:hover,
.btn-register:hover,
.btn-logout:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .user-menu {
        position: static;
        justify-content: center;
        margin-top: 15px;
    }
    
    header {
        padding: 30px 20px;
    }
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

main {
    padding: 40px;
}

.email-generator {
    margin-bottom: 40px;
}

.email-input-section {
    margin-bottom: 20px;
}

.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.input-group input {
    flex: 1;
    padding: 15px 20px;
    border: 2px solid #dee2e6;
    border-radius: 10px;
    font-size: 1em;
    transition: all 0.3s;
}

.input-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn-secondary {
    background: #6c757d;
    color: white;
    padding: 15px 30px;
    font-size: 1em;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
    white-space: nowrap;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

.divider {
    text-align: center;
    margin: 20px 0;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #dee2e6;
}

.divider span {
    background: white;
    padding: 0 15px;
    position: relative;
    color: #6c757d;
}

.btn {
    padding: 15px 30px;
    font-size: 1.1em;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
}

.email-display {
    margin-top: 30px;
    animation: fadeIn 0.5s;
}

.email-box {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 15px;
    border: 2px solid #e9ecef;
}

.email-box label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: #495057;
}

.email-value {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.email-value input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid #dee2e6;
    border-radius: 8px;
    font-size: 1em;
    background: white;
}

.btn-copy {
    padding: 12px 20px;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-copy:hover {
    background: #218838;
    transform: scale(1.05);
}

.email-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #dee2e6;
}

.btn-delete {
    padding: 8px 15px;
    background: #dc3545;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
    transition: all 0.3s;
}

.btn-delete:hover {
    background: #c82333;
}

.email-list {
    margin-top: 40px;
}

.email-list h2 {
    margin-bottom: 20px;
    color: #495057;
}

.email-count {
    background: #e7f3ff;
    padding: 10px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 600;
    color: #0066cc;
}

.email-item {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 15px;
    cursor: pointer;
    transition: all 0.3s;
}

.email-item:hover {
    border-color: #667eea;
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.2);
}

.email-item.unread {
    background: #f0f7ff;
    border-color: #667eea;
    font-weight: 600;
}

.email-item-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 10px;
}

.email-sender {
    font-weight: 600;
    color: #495057;
}

.email-date {
    font-size: 0.9em;
    color: #6c757d;
}

.email-subject {
    font-size: 1.1em;
    color: #212529;
    margin-bottom: 5px;
}

.email-preview {
    color: #6c757d;
    font-size: 0.95em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.email-badge {
    display: inline-block;
    background: #667eea;
    color: white;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.75em;
    font-weight: 600;
    margin-top: 5px;
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5px;
    margin-top: 30px;
    padding: 20px 0;
    flex-wrap: wrap;
}

.pagination-btn {
    padding: 8px 15px;
    border: 2px solid #dee2e6;
    background: white;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95em;
    font-weight: 600;
    color: #495057;
    transition: all 0.3s;
    min-width: 40px;
}

.pagination-btn:hover:not(:disabled) {
    background: #667eea;
    color: white;
    border-color: #667eea;
    transform: translateY(-2px);
}

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

.pagination-btn.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.pagination-dots {
    padding: 0 5px;
    color: #6c757d;
}

.email-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.btn-toggle-search {
    padding: 8px 15px;
    background: #6c757d;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
    transition: all 0.3s;
}

.btn-toggle-search:hover {
    background: #5a6268;
}

.search-panel {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    border: 2px solid #e9ecef;
}

.search-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.search-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.search-row input,
.search-row select {
    flex: 1;
    min-width: 150px;
    padding: 10px;
    border: 2px solid #dee2e6;
    border-radius: 6px;
    font-size: 0.95em;
}

.search-row input:focus,
.search-row select:focus {
    outline: none;
    border-color: #667eea;
}

.search-actions {
    display: flex;
    gap: 10px;
}

.search-actions .btn {
    padding: 10px 20px;
    font-size: 0.95em;
}

.notification-badge {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #28a745;
    color: white;
    padding: 15px 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    z-index: 1000;
    animation: slideIn 0.3s;
    max-width: 300px;
}

.notification-badge.error {
    background: #dc3545;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.email-detail {
    animation: fadeIn 0.5s;
}

.btn-back {
    padding: 10px 20px;
    background: #6c757d;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 20px;
    transition: all 0.3s;
}

.btn-back:hover {
    background: #5a6268;
}

.email-detail-content {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 15px;
    border: 2px solid #e9ecef;
}

.email-detail-header {
    border-bottom: 2px solid #dee2e6;
    padding-bottom: 20px;
    margin-bottom: 20px;
}

.email-detail-header h3 {
    margin-bottom: 10px;
    color: #212529;
}

.email-detail-meta {
    color: #6c757d;
    font-size: 0.95em;
}

.email-detail-body {
    line-height: 1.8;
    color: #495057;
}

.email-detail-body pre {
    background: #e9ecef;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    white-space: pre-wrap;
}

footer {
    background: #f8f9fa;
    padding: 20px;
    text-align: center;
    color: #6c757d;
    font-size: 0.9em;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.loading {
    text-align: center;
    padding: 20px;
    color: #6c757d;
}

.error {
    background: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 8px;
    margin: 20px 0;
    border: 1px solid #f5c6cb;
}

.success {
    background: #d4edda;
    color: #155724;
    padding: 15px;
    border-radius: 8px;
    margin: 20px 0;
    border: 1px solid #c3e6cb;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    
    main {
        padding: 20px;
    }
    
    .email-value {
        flex-direction: column;
    }
    
    .email-info {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
}