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

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

.container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    padding: 40px;
    width: 100%;
    max-width: 480px;
}

.header {
    text-align: center;
    margin-bottom: 32px;
}

.header h1 {
    font-size: 2rem;
    color: #333;
    margin-bottom: 8px;
    font-weight: 600;
}

.header p {
    color: #666;
    font-size: 1rem;
}

.field {
    margin-bottom: 24px;
}

.field label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
    font-size: 0.9rem;
}

.field input,
.field textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.2s ease;
    background: #f8f9fa;
    font-family: inherit;
}

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

.field textarea {
    resize: vertical;
    min-height: 100px;
}

.field.error input,
.field.error textarea {
    border-color: #e74c3c;
    background: #fff5f5;
}

.field.success input,
.field.success textarea {
    border-color: #27ae60;
    background: #f0fff4;
}

.error {
    color: #e74c3c;
    font-size: 0.8rem;
    margin-top: 6px;
    display: block;
}

button {
    width: 100%;
    padding: 14px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

button:hover {
    background: #5a6fd8;
    transform: translateY(-1px);
}

button:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.alert {
    margin-top: 20px;
    padding: 12px 16px;
    border-radius: 8px;
    text-align: center;
    font-size: 0.9rem;
}

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

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

@media (max-width: 480px) {
    .container {
        padding: 24px;
        margin: 10px;
    }
    
    .header h1 {
        font-size: 1.75rem;
    }
    
    .field input,
    .field textarea {
        font-size: 16px;
    }
}