* {
    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;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 600px;
    width: 100%;
    padding: 40px;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

header h1 {
    color: #333;
    font-size: 28px;
    margin-bottom: 8px;
}

header p {
    color: #666;
    font-size: 14px;
}

.menu {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
}

.menu-button {
    flex: 1;
    padding: 14px 20px;
    border: 2px solid #667eea;
    background: white;
    color: #667eea;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.menu-button:hover {
    background: #f0f4ff;
}

.menu-button.active {
    background: #667eea;
    color: white;
}

.form-container {
    position: relative;
    min-height: 400px;
}

.form {
    display: none;
    animation: fadeIn 0.3s ease;
}

.form.active {
    display: block;
}

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

.form h2 {
    color: #333;
    font-size: 22px;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    color: #333;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 14px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

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

.form-group small {
    display: block;
    color: #999;
    font-size: 12px;
    margin-top: 6px;
}

.submit-button {
    width: 100%;
    padding: 14px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.submit-button:active {
    transform: translateY(0);
}

.response-message {
    margin-top: 24px;
    padding: 16px;
    border-radius: 8px;
    animation: slideIn 0.3s ease;
}

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

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

.response-message.hidden {
    display: none;
}

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

.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.loading.hidden {
    display: none;
}

.loading p {
    color: white;
    margin-top: 20px;
    font-size: 16px;
}

.spinner {
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
}

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

@media (max-width: 600px) {
    .container {
        padding: 24px;
    }

    .menu {
        flex-direction: column;
    }

    header h1 {
        font-size: 24px;
    }
}