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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 600px;
    width: 100%;
}

.header {
    text-align: center;
    margin-bottom: 30px;
    color: white;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1rem;
    opacity: 0.9;
}

.card {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.warning-box {
    background: #fef3cd;
    border: 2px solid #ffc107;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
    display: flex;
    gap: 15px;
}

.warning-icon {
    width: 30px;
    height: 30px;
    color: #ff9800;
    flex-shrink: 0;
}

.warning-box h3 {
    color: #856404;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.warning-box p {
    color: #856404;
    margin-bottom: 10px;
}

.warning-box ul {
    list-style: none;
    padding-left: 0;
}

.warning-box li {
    color: #856404;
    padding: 5px 0;
    padding-left: 20px;
    position: relative;
}

.warning-box li::before {
    content: "•";
    position: absolute;
    left: 5px;
    font-weight: bold;
}

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

label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
}

input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input[type="email"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    cursor: pointer;
    font-weight: 400;
}

.checkbox-label input[type="checkbox"] {
    margin-right: 10px;
    margin-top: 3px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.delete-button {
    width: 100%;
    padding: 14px;
    background: #dc3545;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s, transform 0.1s;
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

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

.delete-button:active {
    transform: scale(0.98);
}

.delete-button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.spinner {
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 15px;
    border: 1px solid #f5c6cb;
}

.success-message {
    background: #d4edda;
    color: #155724;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 15px;
    border: 1px solid #c3e6cb;
}

.info-section,
.help-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e0e0e0;
}

.info-section h3,
.help-section h3 {
    color: #333;
    margin-bottom: 12px;
    font-size: 1.1rem;
}

.info-section p,
.help-section p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 8px;
}

.info-section ul {
    list-style: none;
    padding-left: 0;
    margin-top: 10px;
}

.info-section li {
    color: #666;
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
}

.info-section li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #28a745;
    font-weight: bold;
}

.help-section a {
    color: #667eea;
    text-decoration: none;
}

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

.footer-links {
    margin-top: 30px;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #e0e0e0;
}

.footer-links a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.footer-links a:hover {
    text-decoration: underline;
}

.separator {
    margin: 0 10px;
    color: #ccc;
}

@media (max-width: 640px) {
    .card {
        padding: 25px;
    }

    .header h1 {
        font-size: 2rem;
    }

    .warning-box {
        flex-direction: column;
    }
}