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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
    background: linear-gradient(135deg, #f2f6ff 0%, #e8f0ff 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.container {
    max-width: 600px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

/* Header Styles */
.header {
    text-align: center;
}

.main-title {
    font-size: 48px;
    font-weight: 700;
    color: #333347;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 18px;
    color: #808099;
    line-height: 1.6;
}

/* Form Card Styles */
.form-card {
    background: white;
    border: 1px solid #e6e6f2;
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

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

.form-group:last-of-type {
    margin-bottom: 32px;
}

.form-label {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: #4d4d66;
    margin-bottom: 10px;
}

.form-input {
    width: 100%;
    height: 50px;
    padding: 14px 16px;
    font-size: 15px;
    color: #333347;
    background: #fafaff;
    border: 1px solid #d9d9e6;
    border-radius: 8px;
    transition: all 0.2s ease;
    font-family: inherit;
}

.form-input:focus {
    outline: none;
    border-color: #6673f2;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 115, 242, 0.1);
}

.form-input::placeholder {
    color: #9999b3;
}

/* Gender Buttons */
.gender-buttons {
    display: flex;
    gap: 12px;
}

.gender-btn {
    flex: 1;
    height: 50px;
    font-size: 16px;
    font-weight: 600;
    color: #808099;
    background: white;
    border: 2px solid #d9d9e6;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.gender-btn:hover {
    border-color: #6673f2;
    color: #6673f2;
}

.gender-btn.active {
    background: white;
    border-color: #6673f2;
    color: #6673f2;
}

/* Submit Button */
.submit-btn {
    width: 100%;
    height: 56px;
    font-size: 18px;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, #6673f2 0%, #5561e0 100%);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    box-shadow: 0 4px 12px rgba(102, 115, 242, 0.3);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 115, 242, 0.4);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .main-title {
        font-size: 36px;
    }

    .subtitle {
        font-size: 16px;
    }

    .form-card {
        padding: 32px 24px;
    }

    .gender-buttons {
        flex-direction: column;
    }

    .gender-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    body {
        padding: 20px;
    }

    .main-title {
        font-size: 32px;
    }

    .subtitle {
        font-size: 15px;
    }

    .form-card {
        padding: 24px 20px;
    }
}